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Tag: iOS synth apps

Review: SynthMaster 2 is Another Top iPad Synth App From KV331
We previously covered the desktop and iOS versions of SynthMaster One, top notch software synths from the folks at KV331 Audio. Notably, the mobile edition essentially featured the same powerful sonics and control as its desktop brother. Now KV331 effectively repeats this trick with SynthMaster 2 for the iPad. As a result, this synth app belongs in the library of any mobile musician.

SynthMaster 2 Features
- Essentially an iPad Version of the Desktop SynthMaster 2.9
- Dual Layer Architecture Provides Two Synths in One
- 8 Oscillators Supporting Cyclical Waveforms and Samples
- Additive Mode Allows the Stacking of Oscillators
- Wavetable Mode Features Wavetables With 256 Frames
- Vector Mode Allows 4 Oscillators to be Mixed in 2D Space
- The Flexible Use of Modulators Supports FM Synthesis and More
- 6 Different Filter Types With Distortion
- Supports Importing Wave Files to Use as Samples
- A Flexible Massive Modulation Architecture
- Arpeggiator/Sequencer With up to 32 Steps
- Effects Engine With 13 Different Types, 5 Inserts Per Layer, 2 Global Sends
- 4 Graphical Skins
- Runs Standalone or as a AUv3 Plugin
- Requires iOS/iPadOS 11 or Above
- Available at the App Store for $24.99
Needless to say, SynthMaster 2 sports a feature set and architecture rivaling any other iOS or desktop synth app. The sonics also rank at the top of mobile synth world. Let’s dive into the details to see why it makes sense as part of your collection.

A Massive Synth Interface That Fits on Your iPad

Once again, SynthMaster 2 for the iPad essentially includes all the features and functionality of the desktop version of the synth. Depending on the size of your iPad, expect some extra navigation to access the controls you need. The app works in standalone mode, as well as an AUv3 plugin in container apps like AUM. In the latter case, navigating the interface naturally requires additional effort, but it adapts to the available display space as noted in the second video in this article. However, having a massively powerful synth on a tablet computer more than makes up for any minor UI hassles.

SynthMaster 2 for the iPad in action. Screenshot by author.

Of course, using the iPad’s touchscreen to manipulate the controls of SynthMaster 2 provides its own set of benefits. The major achievement of wrangling the entire interface and sonics of a top desktop synth into the limited screen real estate and computing horsepower of an iPad cannot be overstated. So let’s further explore SynthMaster 2’s synth architecture and UI.

The top of the screen contains a standard toolbar providing patch library navigation, access to the effects engine, app settings, and “About” information. Knobs provide volume control for the overall patch and its two layers. Yes, SynthMaster 2 features a dual-layer architecture that’s essentially two synths in one. Two buttons let you select either layer to program while a pair of switches let you turn both on and off.

Note how the SynthMaster 2 interface adapts within a container app. Screenshot by author.

The rest of the interface easily adapts based on your preferences, with buttons effectively serving as tabs for selecting a synth module to edit. Oscillators, modulators, and filters reside in the row below the upper toolbar. Notably, certain modules, like the filters, provide a real-time graphic representation of their operation.

The synth also displays a numerical reading of currently controlled parameters in the patch window box at the top of the screen. KV331 also provides four graphical skins to change the synth’s look based on your preferences. Check out this video of a quick first exploration of SynthMaster 2 for a basic idea of its sound and functionality.

These Aren’t Your Grandmother’s Synth Oscillators or Filters

Options for oscillators abound, with an array of classic waveforms, wavetables, and importable samples. Additive oscillators include eight basic oscillators running simultaneously for huge sonics. Vector oscillators provide an X-Y interface to indulge in vector synthesis between the four oscillators.

FM, phase modulation, ring modulation, and a free oscillator mode all exist. The first three leverage the even more basic oscillators known as modulators. Knobs provide control for oscillator sync, key tracking, drift, detuning, and more. Each main oscillator includes a variety of synthesis algorithms for extra sonic manipulation. It’s the most stunningly deep and complex part of the SynthMaster 2 architecture.

Each SynthMaster 2 layer includes two filters, each with its own six algorithm categories. Those include digital, virtual analog, ladder, diode ladder, state variable, and bite. Options for low-pass, high-pass, bandpass, and others abound. Of course, the standard array of filter controls – cutoff, resonance, key tracking – exist, while other controls vary depending on the algorithm used.

Users also enjoy routing options for the filters accessible from a tab below the filters. Again, the detail and complexity built by KV331 simply stun. Peruse the over 1000 presets to get a feel for the sonic power of this synth’s filters and oscillators.

SynthMaster 2 Provides Deep Modulation Options… and Effects!

Beneath the oscillators and filters lies a section with a wide array of functionality. Four each of ADSR envelopes, multi-segment envelopes, keyscalers, and LFOs serve as modulation sources for each synth layer. Macros (Easy Parameters) and X/Y pads also serve as a source. Simply long press a potential source or destination to set the opposite pair. You are able to add multiple destinations to a single modulation source. A tab to access the detailed modulation matrix lurks at the bottom of the screen. The ability to add modulation pairs from the matrix itself would be nice.

SynthMaster 2’s robust effects section includes 13 effect types with five inserts per synth layer. Two global sends also exist. EQ, distortion, LoFi bit mangling, reverb, phaser, and chorus highlight the effects engine. There’s even a vocoder. Of course, the effects serve as nice modulation destinations.

As noted earlier, when using SynthMaster 2 within a container app like AUM, the user needs to experiment to find the right view. Check out the Broken Highway video below to see different views in action within AUM.

The Most Complex iPad Synthesizer?

All this complexity means little without great sound. Thankfully, SynthMaster 2 offers high-end sonics that easily rival any other iOS or desktop synthesizer. Again, just browse the massive number of presets to get a sense for the nearly limitless sonic possibilities.

Check out this video featuring a SynthMaster 2 jam with three instances of the synth within AUM. It’s a bit of a Berlin School exploration that highlights the inspirational nature of this synth. As noted earlier, the app provides different views of each synth within AUM based upon what I needed to tweak during the jam. This flexible interface definitely helps when considering the limited screen real estate of an iPad.

SynthMaster 2 simply ranks among the best synthesizer apps, desktop or mobile. The fact KV331 fit the desktop version into an iPad remains an achievement to be celebrated. Sure, it’s highly complex, but definitely rewards any deep dive into its robust sound design possibilities. I heartily recommend the iPad version for any iOS musician. Electronic explorers also need to check out the desktop version.
June 3, 2022
Review: Get Your Drone On With Mononoke for iOS
Bram Bos remains one of the leading lights of iOS synth and effect app development. We’ve reviewed much of his work in the past, including Ruismaker Noir, Kosmonaut, and the incredible Rozeta Sequencer Suite, among many others. They all feature great interfaces, support the AUv3 plugin format, and belong in the library of any iOS musician focused on electronic and experimental music.

Mononoke is one of his latest joints; a drone synth perfect for conjuring travels along those lost highways of yore. A great sound and intuitive bespoke interface make it easy to build evolving sonic causeways suitable for many musical applications. We’ve been using it quite a bit lately, so I better finish this review!

Mononoke for iOS Features
- Expressive Drone Synthesizer for the iOS Platform
- Two Independent Synth Engines with Feedback Routing Between Both
- 8 Voice Polyphony – 4 Voices Per Synth
- Interface Features Synth Controls and Unique Performance Pads
- Performance Pads Have Hold Buttons and Support MPE and MIDI I/O
- Universal App With AUv3 Support and Standalone Mode
- Available at the App Store for $8.99
If you are searching for inspiration to power your experimental music projects, look no further than Mononoke. Its high-end features, functionality, and modern sonics are at home in the app collection of the forward-thinking musician. Let’s take a closer look.

Another Great Bram Bos Synth Interface

Mononoke’s user interface and control scheme are deceptively simple but quite powerful. The app features two main screens. One handles the synth controls, while the other features the performance pads and other related functionality. Of course, as a UI design expert, Bram crafted yet another elegant interface; one familiar to users of his other music apps. Additionally, expect a straightforward preset management system like his other apps.

The Mononoke synth screen in action. Screenshot by author.

The twin synth engines sport what looks like a standard array of controls, but this apparent simplicity belies the complexity of the internal routing, wherein Mononoke’s magic lies. Knobs exist for controlling waveform shape, tremolo, and vibrato, with separate rate controls for each parameter. There’s also a LFO switch selecting either a sine wave or pulse. Simple AHR envelopes, low-pass filters, and a unique effects engine focused on warmth and ambience round out this section.

The Performance Pads and Feedback Lie at The Heart of Mononoke

Mononoke’s performance pads reside with the synth’s feedback controls on the second screen. The performance pads are where the app’s sonics truly shine. They are tunable, but also operate in an unquantized free oscillator mode using the switch to the right of the screen. Each pad supports aftertouch on the Y-axis, and pitch bend on the X-axis. Like other iOS virtual keyboards – Animoog for instance – velocity is determined by the location of the first tap. Pressing towards the top allows for a higher velocity. This intuitive approach is somewhat similar to the MPE standard.

The pads help you build expressive drones in Mononoke. Screenshot by author.

Note the app also supports MIDI MPE controllers for extra performance functionality. Still, the embedded pads themselves offer a unique amount of control; just play with them to get a feel for the sonic possibilities. Ultimately, don’t expect to get an optimized sound when triggering Mononoke using a sequencer – the internal pads or an MPE controller is essential.

The pads and the synth’s feedback architecture combine to provide Mononoke’s special sauce. Again, experimentation followed by empirical analysis rewards the user.

Use the six knobs on this screen to control the amount of feedback. The feedback engine leverages phase modulation between voices. Each synth section of Mononoke contains 4 voices, with the three knobs cross-feeding either each individual voice into the adjacent voice, each pair into the other pair, or the entire section into its counterpart. A wide range of sounds are possible, with the switch between Growl and Warp adding to the fun. Remember what we just said about experimentation!

Note you are able to record Mononoke’s MIDI output data – including MPE – when it’s running within an AUv3 host app like AUM. Of course, the app needs to support MPE to receive that data format.

Ghost Traffic Travels Along Route 66

In the wake of Coronavirus pandemic, I am working up a live set of Church of Hed and Quarkspace material along with other surprises. One of the Church of Hed pieces I am going to perform is Hooker Cut from Rivers of Asphalt. As this album is essentially a travelogue along today’s Route 66, I figured Mononoke would be perfect for conjuring up some “ghost traffic” to help me flesh out the sound in what is a more minimalist version of the studio track.

I experimented with a synth patch, creating something that sounded like trucks and other vehicles traveling The Mother Road. The use of the X-axis pitch bends for a Doppler effect also added to the overall sound. Much experimentation between feedback and the pairing of notes also helped add depth.

Mononoke performed beautifully. I used it within AUM to include additional effects. Some BLEASS reverb added a ghostly feel to the proceedings. FAC Maxima finalized the sound perfectly. I will update this review with a video recording of the track once the live set happens. Ultimately, if you need a unique drone synth app in your iOS musician arsenal, Mononoke needs to be on your shortlist. Bram Bos continues to make Apple’s mobile platform a perfect option for the modern experimental musician.
June 16, 2020
Review: miRack Brings the Eurorack Modular Synth to the iPad
VCV Rack garners a lot of praise in the software synth world for essentially being a virtual Eurorack modular synth. It lets users fill their own “racks” with hosts of virtual modules made by the top Eurorack companies. It’s a great way to test drive patches from your own modular hardware rack while also sounding great on its own.

A robust sample patch included with miRack. Screenshot by author.

At this time, there were no plans to publish an iOS version, so Vitaly Pronkin of mifki Limited introduced miRack. Essentially a fork of the VCV project, miRack is now its own entity with many of same Eurorack manufacturers supporting the iOS version with their own modules. In the end, miRack is a virtual Eurorack synth for your iPad.

miRack for iOS Features
- Virtual Eurorack Synth for the iPad
- Over 500 Modules Made by Top Eurorack Companies
- More Modules Added Regularly
- Great Sound and User Interface
- Support for Audiobus, IAA, and Core MIDI
- Requires iOS 11.0 and Later
- Available at the App Store for $9.99
If you are curious about the world of Eurorack, miRack serves as the perfect learning tool. Its great sound lets you use its patches as part of your larger electronic music projects. A robust and active community means you’ll never run of inspiration for new patch ideas. Let’s take a closer look.

miRack Features an Easy to Use Interface

On the iPad, miRack essentially looks like a tablet version of VCV Rack. In short, it’s a virtual Eurorack toolbox. Upon starting a patch, you see an empty rack except for an audio out module. Simply click on the plus sign at the top of the screen to begin adding modules. Other controls at the top include a link for accessing your patch library, a CPU usage indicator, buttons to turn on Move and High Precision modes, a play/pause button, and the traditional wrench for accessing miRack’s settings. It’s simple!

The module browser effectively segregates modules by either manufacturer (“Packs”) or type/function (“Tags”). The types of modules should be familiar to any synthesis veteran – modular or not. If you are new to Eurorack modular synthesis, perusing the Basics pack is a good place to start. Once you add a few modules, a simple finger swipe from output to input (or vice-versa) port patches things up.

It’s easy to slide modules around as necessary. Use the Lock Modules feature to prevent accidental moving. There’s also a Zoom feature for deep diving into complex modules with tons of controls. This is pretty much a requirement with patches with a large amount of modules. You are also able to hide a patch’s cables if necessary. A two-finger swipe serves to scroll about a large patch when zoomed-in.

The collection of included sample patches provides a good idea of what’s possible with miRack. There’s also a robust online community to help you get started on your own creations. Check out the vast array of miRack tutorials on YouTube and other sources.

Excellent Eurorack Sonics From miRack

Thankfully, miRack also features excellent sound. As such, patches are usable in your own music projects. Of course, the sound quality isn’t quite up to the real hardware, let alone the tactile feel of real controls. However, this is really no different than other software synths, including VCV Rack itself.

Make sure you own a recent iOS device, however. The first version of the app I tried on my 5^th generation iPad suffered from audio clipping, even with simple patches. Upon recent updates, that problem disappeared. There’s also a buffer setting to ensure the best possible audio performance. The included CPU meter helps you track how much computing horsepower a patch is using.

Vitaly Pronkin releases regular updates, so it’s reasonable to expect miRack to be well-supported in the future. The app currently supports Audiobus, IAA, and Core MIDI, and hopefully AUv3 compatibility is coming down the pike. Additionally, new modules are regularly added to the miRack collection. While there are other excellent modular synth apps on the iOS platform, miRack ranks at the top as a true simulation of a Eurorack setup. The ability to use virtual versions of actual hardware modules makes this app a winner. Priced at only $9.99 at the App Store, miRack earns a highest recommendation from us at TabMuse. Pick it up and start exploring the wonderful world of Eurorack.
December 23, 2019
Review: SynthMaster One iOS gives your iPad Desktop Synth Power
The folks at KV331 did it again. This time out, they successfully ported their desktop synth plugin – SynthMaster One – to the iOS platform. Any sonic differences between the two are barely noticeable, if at all. iPad synth aficionados need to add SynthMaster One iOS to their shortlist.

SynthMaster One iOS Features
- Semi-Modular Architecture with 2 OSC, 2 Subs, 2 Filters, 4 Envelopes and More
- Wavetable Synthesis with Large Wavetable Library and User Import
- 16-Step Sequencer/Arpeggiator supports those Weirdo Time Signatures
- Synth Presets are Compatible with Desktop Version
- 11 Different Effect Types
- 500 Factory Presets by Leading Sound Designers
- Support for Microtuning
- Robust Modulation Matrix
- Support for AUv3, IAA, Audiobus
- Share Presets using AirDrop, Mail, etc.
- Available for $19.99 at the iTunes App Store
On release, SynthMaster One establishes itself as one of the top synths on the iOS platform. The desktop version is an award-winner, thus it is reasonable to expect a similar reception from iPad musicians. Read on to find out more about this top notch synth app.

SynthMaster One iOS is Essentially Identical to the Desktop Version

The fact SynthMaster One iOS sports an identical feature set as its desktop older brother reveals the quality of this app. Any differences are only minor. The mobile version supports 16 voices compared to 32 on the desktop. There are also 300 fewer presets on the iOS app. That’s it!

SynthMaster One sports an intuitive interface. Screenshot by author.

I had difficulty finding any audio differences between the two apps in my studio. We give much kudos to the team at KV331 for a great job porting SynthMaster One to the resource-constrained environment of the iPad. Other synth (and effect) plugin developers need to look at the iOS platform to port their wares. As always, revenue is the prime driver when making that decision.

An Intuitive iOS Synth App Interface

Just like the desktop version, SynthMaster One iOS features an easy to use interface. Anyone familiar with subtractive synthesis simply needs to dive right in. In a similar manner as SynthMaster One Desktop, the iPad app fits everything onto one screen.

SynthMaster One iOS with the modulation matrix and sequencer displayed. Screenshot by author.

Patch management and other utility functions lurk at the top of the screen. The meat of the synth architecture is housed below in an array of tabbed windows. Everything is clearly laid out and easy to follow. Oscillators, filters, envelopes, LFOs, routing, effects, sequencer, a modulation matrix, and the expandable virtual keyboard are all easily managed.

When tweaking many of the synthesizer controls, a graphical indication of the setting – in real time – magically appears in the center of interface. It returns to normal when complete. This provides another example of the usability of SynthMaster One.

Sliders, buttons, and switches are clearly displayed. If you are new to synthesis, the manual helps to explain some of the more esoteric concepts. Additionally, check out the iOS tutorial videos for additional insights into SynthMaster One’s functionality.

A Top Notch Synth Engine

If you read our review of the desktop version of SynthMaster One, you understand the care KV331 took in giving the app many of the same characteristics of a hardware synthesizer. For example, support for free oscillators and drift simulate some of the unique behavior of a vintage piece of gear. Each oscillator also gets its own suboscillator, making it easy to create those synth patches of doom.

Support for both wavetables and waveshaping algorithms is another welcome feature of SynthMaster One iOS. Waldorf Nave is one other iOS synth featuring wavetable architecture. This functionality, including the ability to import your own wavetables, also greatly adds to the sonic scope of the instrument.

The arpeggiator/sequencer is easy to use and supports odd time signatures. 11 different effect types add to the fun. Each synth patch has five effect slots. They are perfect for finishing off the perfect sounding preset.

Browse the 500 factory presets to get a feel for the possibilities with SynthMaster One. The patch browser uses an attribute-based identification system, making it easy to find something suitable for exploration. Some of the top sound designers in the business built patches for the instrument. Remember, your desktop patches are compatible with the iOS version!

Thankfully, SynthMaster One iOS supports the AUv3 plugin format. The app also handles Audiobus and Inter-App Audio, making it easy to use the synth in your current and future mobile music projects.

Since hitting the App Store, SynthMaster One iOS quickly rose to the top of the list of iOS synth apps. Its compatibility with the desktop version makes it easy to swap patches between the two platforms. If you are in the market for a top shelf iPad synth app, put it on your shortlist. KV331’s first mobile synth app is that good!
July 31, 2018
Review: AudioKit Synth One revolutionizes the iOS Synthesizer World
The open source movement revolutionized the technology world by changing how software gets written. A stunning amount of today’s tech products boast at least a partial open source background. Its community-driven focus attracts talented developers wanting to learn, contribute, and be a part of something bigger than simply schlepping code for some faceless corporation.

AudioKit is an open source audio framework for the iOS platform. The team behind AudioKit recently introduced Synth One, an open source synthesizer making waves throughout the iOS musician community. Let us dive into the details to see how this free synth just might be one of the best music apps available for Apple’s mobile platform.

AudioKit Synth One Features
- Virtual Analog/FM Polysynth
- Five Oscillators (DCOx2, FM, Sub, Noise)
- Two LFOs with a Ton of Routing Options
- 16-Step Sequencer and Arpeggiator
- ADSR Envelopes for Amp and Filter
- 4-Pole Lowpass Filter
- Highpass and Bandpass Filters
- Reverb, Delay, and More
- Over 300 Presets from Top Sound Designers
- Bluetooth MIDI and MIDI Learn
- Audiobus, IAA Support
- AUv3 and MPE Support Soon!
- Available for Free at the iTunes App Store
Simply put, Synth One belongs in the library of any iOS musician. The same rule applies even if the app cost $10-20! It truly is one of the best synth apps on the iPad or iPhone. Find out why.

An Intuitive Interface makes Synth Programming Easy!

Synth One sports a clean and intuitive interface. A small row at the top handles patch management as well as some “housekeeping” functionality. The meat of the interface lies within two larger windows with a pair of buttons at the right used to navigate between different pages. A resizable keyboard lies at the bottom of the screen.

Synth One in action. Check out the cool virtual oscilloscope. Screenshot by author.

One cool perk of the two-window interface lets you keep the main screen in the top window, while navigating the rest of the pages in the bottom window. This concept also works with other pages, and is especially useful when using the Kaoss-inspired X-Y Pad screen. It’s the kind of UI flexibility one expects from an engaged developer community.

Other pages handle the envelopes, effects, master tuning (with over 100 alternate tunings), and the 16-step sequencer. Don’t worry; those prog-friendly odd time signatures are supported! The interface buttons and switches are large; providing a smooth and easy operating experience.

Great Sonics highlight this Free iOS Synth App

Simply put, Synth One offers stunning sound quality for the iOS platform. The synth app easily produces everything from spacey pads to searing analog leads to freaky FM bells with hardly a sweat. The embedded Costello reverb and multi-tap delay definitely help in this regard.

The synth architecture follows a standard subtractive model. The two DCOs let you gradually vary between the different waveforms, like the Moog Sub 37 and other hardware synths. It beats simply switching between waves like most synths. An FM oscillator, suboscillator, and a noise circuit round out the five oscillator setup.

You use the knobs for controlling the ADSR settings on both envelopes. Even cooler is simply drawing the envelopes with the touchscreen. The two LFOs offer four different waveforms as well as a host of routing options. A phaser combines with the previously mentioned reverb and delay in the effects section. Use the bitcrusher to mangle the sound even more; making it an LFO destination gives your patch some motion.

A bouncy 12/8 in the old school way. Screenshot by author.

The intuitive 16-step old school sequencer works perfectly. Two X-Y pads mentioned earlier also add to the fun. The tuning and pitch screen lets you switch between the over 100 alternate tunings. A colored pitch indicator provides some visual candy, especially when performing a sequence.

An Open Source Revolution for iOS Music Apps

Obviously as the product of a robust open source community, Synth One enjoys regular updates. The team is currently working on AUv3 support. Any delay in its release is related to programming things the right way so other interested iOS music app developers are able to use the same source code for their own apps.

That last point perfectly speaks to the positive impact made by open source software throughout the tech world. It appears iOS musicians – and developers – are now able to reap these same benefits. A thousand thanks to the team at AudioKit! Join up if so inclined!

If you haven’t yet downloaded AudioKit Synth One – get to it! It will likely become an indispensable part of your mobile music production workflow. By the way, AudioKit’s FM Player synth is also worth a free download.
July 24, 2018
Review: A Venerable Chord Organ is yours with iOptigan for the iPad
The Optigan brought the chord organ concept into homes in the early 70s. Backing patterns, recorded in a variety of genres onto optical discs, were part of the allure of this early sample playback instrument. Now you can enjoy those halcyon days of yore on your iPad, iPhone, or iPod Touch, as the Optigan is now available as an iOS app, imaginatively called iOptigan.

iOptigan Features
- Dead-On Simulation of the Classic Optigan Chord Organ
- 25 of the 40 Original Optigan Discs Included
- The Other 15 available with an In-App Purchase
- Virtual Reverb
- MIDI I/O and MIDI File Support
- Built-In Sequencer
- Inter-App and Background Audio Support
- Available for $4.99 at the iTunes App Store
The app definitely sounds authentic and some of its stranger backing tracks may be useful in your own music projects. If classic chord organs are your thing, iOptigan is the closest you’ll come to experiencing their joy on an iOS device. The app was developed by Waldorf Music’s CTO, Stefan Stenzel, as a side project from his day job.

Simulating the Interface of a Classic Chord Organ

The iOptigan interface works well at capturing the original chord organ’s look and feel. An array of chord buttons provides major, minor, and diminished options for a set of root notes. Five rectangular buttons are used to trigger backing beats, in either a one-shot or looped mode depending on where the button is pressed.

The iOptigan app with the virtual keyboard displayed. Screenshot by author.

Four buttons lurking in the top left of the screen are used for accessing settings, controlling the internal sequencer, or displaying the organ keyboard. Virtual knobs control the unit’s tempo, reverb, and the balance between the backing tracks and the organ. A virtual power switch also offers some musical use in a hip-hop DJ fashion.

A Bizarre Collection of Backing Tracks

25 of the original Optigan collection of 40 optical discs are included with the app. The other 15 are available through an In-App Purchase. The lo-fi backing tracks span a range of inoffensive genres popular in the 70s – everything from the samba to acoustic guitar pop is in there.

The sound of the organ is great, especially with the included virtual reverb at full bore. Thankfully, the app supports MIDI, so use a keyboard controller with the iPad set to the left for a true Optigan experience. If old school kitsch is your thing, iOptigan definitely warrants your attention. It definitely belongs in the “curio” section of the iOS app library.

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December 12, 2017
GridInstrument controls your iOS Music Apps – Synth News Digest 12
The touchscreen on any iOS mobile device opens up a world of possibilities for controlling synths or other music apps. We previously covered Aftertouch, an app that takes advantage of 3D Touch on newer iPhones for additional control options. This time out, we train our eye on GridInstrument, which eschews the traditional piano-style keyboard in favor of a grid layout for playing a synth app.

GridInstrument in action. Screenshot by author.

A host of options exist letting you select the key, scale, and grid layout. GridInstrument also supports the iOS Core MIDI and Audiobus 3 MIDI standards – an essential feature for any controller app. I had it playing some freaky sounding Zeeon patches to great effect. For me, these different controller “metaphors” make more sense with non-traditional sound sources. A basic internal synth helps for testing out your grid setup.

The app also integrates nicely with Novation’s Launchpad grid controller, suitable for those who use Ableton Live as a DAW. If you are interested in checking out GridInstrument, simply head over to the iTunes App Store and pay your $2.99. It’s definitely worthy of exploration for those who don’t like traditional piano keyboard control.

Eventide shines at AES New York 2017 Show

Legendary effects maker, Eventide garnered a significant amount of buzz at this year’s AES show in New York City. Two new products especially drew our attention. The flagship H9000 rackmount processor ups the ante with four separate quad core processors supporting eight channels of audio I/O.

It comes with a remote control application, called emote, which works as a standalone app for the PC or Mac, as well as supporting most popular plugin formats. The unit is slated to hit the market next March, with two models priced at $4,999 and $6,999 respectively. If interested, check out this blog from Jack Impink who’s currently beta-testing the unit.

The other interesting AES reveal from Eventide involves their first foray into the Eurorack world. The EuroDDL fits Eventide’s classic digital delay – cue Jon Anderson – into a reasonable horizontal pitch space. It offers 10 seconds of delay at a 192 kHz sample rate and 160 seconds at 16 kHz.

Available in January, the EuroDDL runs $399. The unit found inspiration in Eventide’s DDL-500, their classic Series 500 delay unit. For more information simply click on this link.

Expert Sleepers introduces a General MIDI Eurorack Module

General MIDI remains an interesting offshoot of everyone’s favorite musical instrument digital interface. I was burned by a General MIDI module in the mid 90s not sounding anywhere as good as my Yamaha QY-20. Unfortunately, Expert Sleepers doesn’t care about my frightening stories of sonic yore, as the company recently introduced a GM module in the Eurorack format.

General CV combines a General MIDI synth with a host of MIDI to CV conversion functionality. Tongue firmly in cheek, Expert Sleepers’ director Andrew Ostler commented: “For too long, Eurorack users have been denied important sounds, such as ‘Voice Oohs’, ‘Orchestra Hit’ and ‘Shakuhachi.’ We’re delighted to finally bring these classic tones under CV control where they belong.” Indeed.

Those halcyon days of the 90s are back in a rack, all at the convenient price of $349! Check out the Expert Sleepers General CV page for more information.

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December 5, 2017
Review: Zeeon – a State of the Art Synthesizer App for the iPad
If you are searching for a leading edge iOS virtual analog synth that also works as AU plugin, look no further than Zeeon. The latest release from BeepStreet, purveyors of another excellent iOS synth, Sunrizer, and the very cool drum synth, Impaktor, this is a high quality music app that immediately rises to the top of the iPad synthesizer scene. It features a deep sound engine, straightforward interface, and – AU support!

Zeeon for the iPad Features
- Two Variable Waveform Oscillators with Hard Sync and Sub Oscillator
- Three Filter Models – Ladder Style, OTA Cascade Low Pass, State Variable
- Two LFOs and EGs per Voice
- Monophonic, Polyphonic, and Unison Modes
- Pre and Post Filter Overdrive Circuit
- Two Separate Voice Layers with Cross Modulation
- Robust Modulation Matrix
- Effects include Delay, Reverb, Phaser, Chorus, and Bass Booster
- Excellent User Interface
- AU Support and Standalone Mode with a Bare-bones Step Sequencer
- 144 Inspirational Presets
- Available at the App Store for $9.99
Simply put, Zeeon is a must-have synth app for iOS users. Its user interface, sonics, and architecture are all top notch. Let’s dive into a few details!

An iPad Analog Synthesizer worthy of your Attention

Zeeon’s interface should make any veteran subtractive synthhead feel at home. The left side of Panel 1 lets you navigate between the two synth layers, as well as access a second screen (“Panel 2”) with effects and other voice parameters. It also has a cool virtual oscilloscope offering a real-time view of the current waveform, while also providing access to the patch library.

Panel 1 contains the meat of Zeeon’s synth architecture. Screenshot by author.

The rest of Panel 1 includes sections for the oscillators, a mixer, filter and envelopes, LFOs and the drive circuit, as well as a modulation matrix. A virtual keyboard and step sequencer are also useful when using Zeeon in standalone mode, which is where I’m currently at musically, doing overdubs on the next Church of Hed album. The virtual knobs and switches render well and perform as expected on the iPad’s touchscreen.

A Robust Subtractive Synth Architecture

Zeeon is based on a standard subtractive synth architecture with a host of cool features, most notably a high-end analog circuit modeling engine, leading to its stellar sound quality. Additionally, the waveforms are continuously variable, which makes them highly suitable as targets in the modulation matrix. The engine also simulates real-world analog circuitry, including transistor saturation, oscillator drift, and the influence of the power supply. Thankfully, it stays in tune!

Two separate synth layers lend themselves to cross-modulation possibilities. The interface also supports copying between the two layers, which is useful when in sound design mode. Speaking of which, the robust modulation matrix lets you execute pretty much any weird sonic idea you desire.

Effects and other fun stuff reside on Zeeon’s Panel 2. Screenshot by author.

When it comes to Zeeon, what’s not to like? Three different filter models, a useful effects engine, a drive circuit, and so much more. Preset surfing is a blast, and usually triggers an inspiration for a new patch idea of your own.

Its support for the AU plugin format is essential. (For iOS music app reviews at TabMuse, I expect to focus only on those apps supporting AU moving forward.) I can’t wait to finish my current album, so I can start beatmaking, and using Zeeon in Modstep or Beatmaker 3. The step sequencer in standalone mode is barebones but still useful when auditioning a patch.

Zeeon ranks near the top of iOS synth apps, which is all the more impressive considering BeepStreet isn’t a famous hardware synthesizer company. This is one of the easiest recommendations we’ve ever made at TabMuse. Run out and git ya some!

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October 30, 2017
Review: Explore Deep Sonic Vistas with SynthScaper for iOS
If you are searching for an iPad music app suitable for creating rich and unique ambient drones look no further than SynthScaper. An innovative user interface combines with top notch sound quality to make the creation of these sonic atmospheres rewarding and fun. In addition to the spaced-out ambience, this app also offers somewhat traditional instrument simulations with an interesting twist or two.

SynthScaper for the iPad Features
- Three Oscillators with Three Layers Each
- Six Voices in Each Oscillator Layer
- Six Envelope Generators and LFOs
- Discrete Arpeggiator for Each Oscillator
- Each Layer has its Own HPF, LPF, Level, and Balance Controls
- A Very Cool “Spatial” Mixer
- Flexible Virtual Keyboard plus Support for Two MIDI Controllers
- Sample Upload using Dropbox, Clipboard, or Web
- Robust Preset and Sample Library
- Support for IAA and Audiobus
- Universal App for iPad and iPhone
- Available at the iTunes App Store for $9.99
A simple glance at SynthScaper’s feature set hints at its massive sound along with the architectural flexibility to foster new kinds of alien planetscapes. When also considering Ripplemaker, there’s no denying the iOS synth world now offers two top notch apps for designing ambient drones. Developed by Igor Vasiliev, known for SoundScaper and other iOS music apps, it is easy to recommend SynthScaper.

Real-Time Drones for the Revolution

SynthScaper’s user interface is largely dominated by the Spatial Mixer at the upper middle of the screen. Three circular “orbs” represent the three oscillators, with nifty radial sliders for controlling the overall level of each oscillator as well as the two effect sends. Drag the orbs around the mixer for to move each oscillator around the sound space, while the current waveform is displayed in real-time using a cool oscilloscope-like display. That latter feature can be disabled on resource challenged devices

SynthScaper’s Spatial Mixer in action. Screenshot by author.

This interface innovation facilitates the real-time manipulation of drones; one of the biggest selling-points of the app for me. You are also able to mute oscillators, hold notes, and add even new ones to a drone using the virtual keyboard or an external controller. A meter at the bottom screen displays the overall level of the patch.

A Rich Synthesizer Architecture

Each oscillator in SynthScaper includes three separate layers. Manage each oscillator using the menu (one for each) on the left side of the screen. You also control the filter, arpeggiator, and keyboard settings for each oscillator from this menu.

The oscillator settings screen is incredibly detailed. You are able to load either factory or your own samples for each layer, greatly adding to the app’s extensibility. A whole host of other settings to manage sample playback – including the six envelopes and LFOs – are also accessible.

SynthScaper features a rich synthesizer architecture. Screenshot by author.

In addition to controlling SynthScaper’s robust filters, the synth’s two effects channels are also managed from the filter parameters page. While this architectural-slash-interface style seems confusing at first, the additional flexibility is welcome after getting used to it. In a similar manner, the LFO and envelope settings are also accessible from each page where they are used.

Buttons to manage SynthScaper’s thorough keyboard mapping settings and an arpeggiator page are also available for each oscillator on the left menu. The menu on the right side provides access to the manual, settings and other utility functions – including file wrangling with Dropbox support. A small menu at the top of the screen handles patch (known as a “Scene”) management. Of course, there is a reverb – essential for quality droning activities.

SynthScaper just might be the best drone app on the iOS platform – and it does so much more – check out the Vox Continental scene. Excellent sound quality and a great interface, highlighted by the Spatial Mixer, make manipulating drones in real time a blast. I am currently putting the app through its paces on a couple tracks on an upcoming Church of Hed release.

The bottom line is quite simple: you need SynthScaper in your app library.

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August 4, 2017
Review: Ripplemaker brings West Coast Modular Synthesis to iOS
Ripplemaker is the latest iOS music app from Ruismaker and developer, Bram Bos. Essentially a semi-modular synthesizer focused on West Coast techniques, consider Ripplemaker to be the tablet-based cousin of Make Noise’s excellent 0-Coast desktop synth. Suitable for the creation of drones and other sonic atmospheres of doom, this is another excellent product worthy of attention from any iOS musician.

Ripplemaker Features
- Easy to Use Semi-Modular Synth App
- Complex Oscillator, FM, Lowpass Gate, Slope Generator, Maths!
- Virtual Patch Cables Abound
- The Excellent Bram Bos Sequencer
- AU Plugin with a Small Footprint
- Support for Audiobus, Core MIDI, Virtual MIDI, Bluetooth MIDI
- Exports MIDI and Audio Files
- Universal App for both iPad and iPhone
- Available at the App Store for $8.99
If you have any level of interest in modular synthesis, Ripplemaker belongs in your iOS app collection. Its “single screen” interface is easier to grasp than other iOS modular synths. Check it out!

An iOS Modular Synth on One Screen

The fact Ripplemaker easily fits on one screen makes it easier to use than most other iOS modular synth apps, like Audulus and the Moog Model 15 – both of which I love. Empirical experimentation gets rewarded as virtual cables are easily dragged and dropped between patch points. While drones are one of the biggest selling points for Ripplemaker, the excellent Bram Bos sequencer – as seen in Troublemaker and other Ruismaker apps – is also part of the app when used in standalone mode.

Ripplemaker in action on the iPad. Screenshot by author.

Ripplemaker’s screen layout is somewhat reminiscent of the 0-Coast. From left to right are sections labeled Control Signal, Oscillator, Slope, Lowpass Gate, and Envelope, with an LFO and amplifier that also includes a delay. Color-coded jacks make wiring up patches an easier process. You are also able to break the normalized input jacks to build your own interesting sounds, while the normalized outputs are shareable with different inputs. Stack those virtual patch cables!

West Coast Synthesis on iOS

A West Coast synthesizer architecture lies at the heart of Ripplemaker. The basic oscillator is a triangle wave, while a voltage-controlled knob allows morphing into a square wave. Additional waveform complexities are generated using the wavefolder and push controls – the latter adding a DC offset. FM modulation – with multiple options for a modulator – rounds out the synth’s oscillator design.

The versatile slope generator is usable as an AD envelope, LFO, or another oscillator. The envelope is the default setting. Simply tap the “cycle” checkbox to switch it into LFO mode – this is somewhat similar to the 0-Coast. Tapping “keytrack” allows the same CV signal used for the main oscillator to control the slope frequency, with fine tuning allowed by the voltage controlled curve knob. Sonic possibilities abound.

A low pass gate circuit serves as Ripplemaker’s West Coast version of a filter combined with a VCA in the Buchla School way. The “gate:filter” knob emphasizes either the filter or the amplifier, and of course, it’s voltage controlled. The combined noise/sample and hold module only adds to the fun.

A standard ADSR envelope, with two discrete output jacks, adds to Ripplemaker’s architectural flexibility. This module also provides an output jack that sends a pulse when the decay starts. The amplifier and LFO dual module rounds out Ripplemaker’s architecture; a built-in delay helps push your sonic designs over the cliff as necessary.

Can-Utility and the Control Signals

Ripplemaker’s Control Signal module takes incoming MIDI information and converts it into the CV and gate signals used throughout the synth. A separate clock I/O helps keep the synth in sync. The utility section essentially serves as a maths module. It provides inputs, attenuators, and outputs with an add/multiply circuit used to blend both inputs – either a CV or an audio signal. It’s definitely useful.

Unlike Troublemaker, Ripplemaker allows for the saving of patches, albeit without Save As/Overwrite functionality. Granted, since it is an AU plugin many users take advantage of their iOS container app’s state saving functionality when designing patches. I primarily use iOS synths in standalone mode through a bunch of outboard effects before the audio ends up in ProTools, so in-app patch saving is helpful.

If you are interested in exploring West Coast modular synthesis without investing hundreds of dollars in hardware, Ripplemaker serves as a perfect introduction. With a simple and intuitive interface that rewards experimentation, it is a powerful and flexible synth without the complexity of other iOS modular synthesizers.

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July 26, 2017