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Roxsyn Guitar Synthesizer

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App History

Oct 07, 2020
Oct 05, 2020
Aug 17, 2020
Aug 10, 2020
Jun 01, 2020
May 26, 2020
Jan 06, 2020
Dec 22, 2019
Nov 25, 2019
Nov 22, 2019
Aug 28, 2019
New App: $9.99, v1.0
Jul 29, 2019

Other apps by Yonac Inc.

App Store Description:

Introducing a revolutionary new way to turn your guitar or bass into a fully featured polyphonic synth: Roxsyn, the world’s first metamorphic guitar synthesizer. Expressive, fast and responsive to every nuance, it is a league apart from all other guitar synths to date.

Unhappy with cold and temperamental guitar-to-MIDI synths that dominate the market, we developed a completely new approach to guitar synthesis. Our all-original technology synthesizes your guitar directly, without the use of MIDI notes. Rescued from being a poor keyboard substitute, your guitar suddenly becomes an integral part of the synth. It's alive!

There is no pitch tracking involved. There are no pitch estimation errors, octave glitches, or garbled chords. There is no over-complicated G2M between your guitar and synth to destroy everything human about your playing. Instead, Roxsyn’s metamorphic sound generation technology retains all the personality of your sound: vibrato, slides, bends, dynamics, even extended technique. The result is a polyphonic synthesizer that is as fast and accurate as it is richly expressive.

No need for special MIDI pickups or hardware, either: just plug into your favorite Lightning/USB audio interface, and start synthing!

::Powerful Synth Engine::

Roxsyn’s big synth heart is its three metamorphic signal generators (AKA oscillators). Each generator offers 5 unique waveforms, and has a 4+ octave range to cover a wide spectrum of frequencies. They also feature stereo panning, and can route into either of Roxsyn’s dual filter banks. You can even dial in your guitar directly into the synth engine for even bigger sounds.

::Dual Filter Banks::

Each containing four custom virtual-analog filter types and dedicated envelopes, the filter banks help sculpt the synth generators in countless new ways. The envelopes are specially designed for the guitar, and are driven by a fully adjustable automatic trigger generator controlled by your playing dynamics. Envelopes offer original features like finite-duration sustain stages, as well as the ability to receive or ignore trigger-off messages. They can also be triggered externally via MIDI controllers like an expression pedal.

An additonal envelope controls the amplitude of the signal, giving you even more options in creating synth sounds.


Instantly transform sustained guitar notes into fast (or slow), complex patterns with Roxsyn’s powerful yet easy to use arp. There are 8 stepping algorithms to choose from, as well as settable note value, swing, and note repeats. You can even route the arp to any combination of the 3 voice generators — enabling you to layer a non-arpeggiated sound with an arp pattern. What's more, the arp can send trigger signals into any of Roxsyn’s 4 envelopes, and even reset the LFOs. So it’s also a handy rhythmic / trance tool as well!

::Modulation & FX::

Roxsyn’s user friendly modulation matrix lets you manipulate parameters (pitch, amplitude, filters, etc) using its two LFOs and mod envelope. Add subtle vibrato, even glide simulation, or go full-on berserk. LFOs each have 9 waveforms, and feature beat syncing. Each matrix row can take LFOs or the mod envelope as a modulator or control, and can even use external control sources.

And if you like your synths on the spicy side, Roxsyn comes with top-notch stereo FX specially developed to evoke extra synthiness: Powerful algorithmic reverb with the sound of countless rooms, phasing, modulating, 2-channel delay, and graphic EQ.

::Pro Features::

500+ factory presets with bass, lead, pad, arp sounds & more. Easily create & share your own presets. Audio Unit v3, IAA, Audiobus, Ableton Link. 64-bit processing at up to 96kHz. 160+ MIDI controllable parameters; MIDI learn & map save/share. Tapedeck (in the app), so you can record, loop & share your ideas on the go. Just some of Roxsyn’s professional features that make life and music a little bit easier.

iPad Screenshots:

iPhone Screenshots:

Jakob sent out a message on Facebook the other day letting us know that this (and others) was on sale for a $1. Best dollar I've ever spent. This app just made me want to toss all of my synth pedals in the trash. This thing has the best tracking. Period. I've only had it for a couple of days now. So many presets to go through. Stil trying to get all of my favorites together and then start making a DX7 if possible. Sweet sweet synthy goodness here.
October 07, 2020  | person Rednecksamurai
I have a C4 pedal that tracks really fast. I also have a couple Roland/Boss GK boxes that track very quickly, or use some other modeling that is more direct.

I tried this, and could tell that it would be quite useful for processing audio tracks, but for live playing the inherent latency of iOS was still too much for my tastes. YMMV.
October 07, 2020  | favorite_border stub
I had bought this app at the same day it came out because of my fascination with guitar synthesizers, but I was (and still am) really disappointed by this. Maybe it’s my my fault, maybe it’s the fault of the way this is advertised, but this is NO guitar synth

It’s a polyphonic pitch shifter - nothing more and nothing less.

@Rednecksamurai: You won‘t ever get DX-7 sounds out of it, because it can’t produce them, and it won’t output MIDI notes to the synth of your choice as well. So, in my book a real bummer...

I still have a Zoom 9030 FX device from the early 90ies, which just does more or less the same as this app at more or less the same tracking speed and more or less the same audio quality. So why the hell are Yonac trying to sell something that didn’t improve at all from this more than 25 years later?

And no, that Zoom device definitely IS cool, but I am pretty shure that the pitch shifting algorithms are not one the reasons why you would ever consider buying it :-)
October 08, 2020  | person Granthafen

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