Roxsyn Guitar Synthesizer

Roxsyn Guitar Synthesizer

Metamorphic Synth for Guitar

86 ratings
48 reviews
#197 in paid Music
🎵 Music
$19.99

Details

  • Released
  • Updated
  • August 5, 2019
  • November 14, 2024
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About

Transform your guitar or bass into a powerful, expressive polyphonic synthesizer without MIDI. This app synthesizes your instrument directly, capturing every nuance of your playing for rich, responsive synth sounds. No special pickups or hardware needed, just connect to your audio interface.

Direct guitar synthesis (no MIDI)
Metamorphic signal generators (oscillators)
Dual filter banks with custom virtual-analog filters
Guitar-optimized envelopes with adjustable triggers
Powerful arpeggiator with multiple algorithms
Modulation matrix for parameter control
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What's New in Roxsyn Guitar Synthesizer

1.3

November 14, 2024

This is an important update that modernizes the MIDI functionality in the AUv3 context, and also ensures general robustness for the iOS 18. It provides additional optimizations to the AUv3 and standalone packages. The AUv3 plugin dispenses with its “external” MIDI in port, which is deprecated. All MIDI connections to the Roxsyn AUv3 should be managed via the hosting application or DAW instead, which is now the correct convention. If your plugin hosts / DAWs don’t automatically route MIDI into FX plugins, please refer to their documentation to learn how to do so.

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Top Paid

📉 197-18

Music

This app dropped -18 positions in Music chart.

Last updated on July 10, 2026.

User reviews

Great app!

I love throwing this in my chain as a parallel part of the rig for a nice fusion lead tone.

Dude!!!!!

It’s so good , I don’t even want others to know about this app. I’m from a small Texas town and I’m not sure people are ready for me to blow their minds. This turned a bad day into a really great life. Genius developer.

Was expecting something useful

Yonac makes some great apps. My favorites are the Steel Guitar Pro and the Galileo 2 in terms of usefulness and the way they fit with other apps and midi control effects in an app like AUM. I don’t have Magellan Synth 2 or the newest Trooper, which I would love to check out, but haven’t found the reason to spend $15 for each yet.

There is a lack of consistent quality guitar interface synths with midi translation that maintain iOS updates. The decent ones seem to suddenly vanish - like midimorphosis.
That being said, that’s not what this app is. In fact there is no midi control function. It’s just a very thick and oozing filtering app that takes a guitar signal and destroys it with effect parameters commonly found on oscillation type synthesizers, with filtering, arping, and all of the other common audio effects, plus lots and lots of distortion.
I have yet to find a use for it honestly, which is weird considering how many presets it has - presets that have very little range. Of you want to go from noisy lower pelagic oceanic deep distorted and modulated reverb to lush distorted low pass filtered arpeggiated offset delays that have no discernible pitch modulation, then there are millions of presets for everything in between those two.
If there were better clean tones, o might be able to use this.

A rare miss imo for Yonac, but you might find it vastly and useful.
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Zero tech-support if you have a problem

It pains me to give this a negative review because the videos look so cool but after paying for it it has some problems and I am not able to successfully run it. I’ve reached out to tech-support through their website and emails multiple times over the past few weeks with zero response. I feel like my money has been stolen.
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1-star for hobbling GarageBand on Apple Silicon, and not responding.

Things do go wrong. But this is two of this developer’s apps now, consistently cause GarageBand AUv3 issues, this is by far the worst for this (pls see below). I gave it 3 stars for the hobbling of GarageBand, but now it’s one star because I think it’s being ignored. I actually slightly object to being an unofficial test-pilot for the app-makers. Being a test-pilot and the issue being ignored, for 3 apps (just got KASPAR and it’s got it’s own issues), is too much, sorry Yonac, please do fix it. If it’s ongoing work, fine. But that needs said, is all.

Love Yonac apps, have a lot of them, they are great. But, keeping up with Apple’s changes is stretching some developers it seems, and while some issues can be a quality issue, this literally stops the use of GarageBand, if it is placed an any FX list, for any instrument. Long story short, you are sent round and round, when you try to exit - but you can never exit and save. I have let Yonac support know. I won’t use an app if there is a fair chance it will lose me my work - and this is not a 50/50, it’s absolutely guaranteed, it does it ten out of ten times. Then I delete Roxsyn from the single track it’s on, and voila, all works as normal. Apple iPad Pro M1. 12.9” and iPadOS 15.7.1 so it could just be Apple Silicon affected? I don’t know. It’s above my IQ grade! Sorry Yonac, hope it can be fixed soon. I also have a similar issue with Yonac’s Galileo Organ 2, but I mentioned that to their support as well, it’s more like half the time, it fails to permit exit/save in GB.
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Developer apps

FAQ

What does the Roxsyn Guitar Synthesizer app do?

Roxsyn is a revolutionary app that transforms your guitar or bass into a fully featured polyphonic synthesizer. It synthesizes your instrument's sound directly, without relying on MIDI, capturing the nuances of your playing like vibrato, slides, and bends for a rich and expressive synth experience.

What are the key features of Roxsyn?

Key features include its direct guitar synthesis technology, three metamorphic signal generators with unique waveforms, dual filter banks with custom virtual-analog filters, guitar-optimized envelopes driven by playing dynamics, and a powerful arpeggiator for creating complex patterns. It also offers a modulation matrix for extensive sound sculpting.

How do I connect my guitar to Roxsyn?

You do not need special MIDI pickups or hardware. Simply plug your guitar into your favorite Lightning or USB audio interface, and then connect that interface to your device running the Roxsyn app. This allows for a direct connection to the synthesizer engine.

What makes Roxsyn different from other guitar synths?

Unlike traditional guitar-to-MIDI synths that can be temperamental and lose human playing nuances, Roxsyn uses a completely new approach. Its metamorphic sound generation technology synthesizes your guitar directly, avoiding pitch tracking errors and preserving the full expressiveness of your playing.

Is Roxsyn compatible with all guitars and basses?

The app is designed to work with both guitars and basses. As long as you can connect your instrument to a compatible Lightning or USB audio interface, you should be able to use Roxsyn to create synthesized sounds.