• ModSynth Modular Synthesizer 1
  • ModSynth Modular Synthesizer 2
  • ModSynth Modular Synthesizer 3
  • ModSynth Modular Synthesizer 4

ModSynth Modular Synthesizer

ModSynth is an advanced modular synthesizer allowing construction of complex polyphonic instruments. Connect any number of oscillators, filters, delays and other synthesizer modules in a graphical editor. Then, adjust the settings of each module while playing the instrument to get a desired sound. Save as many instruments or variants of an instrument as you'd like. Ten built-in instruments are provided to help you get started.
The free version contains the following modules:
- Keyboard
- Pad (for theremin and "scratching" effects)
- Oscillator
- Filter
- Envelope
- Mixer
- Amp
- LFO
- Sequencer
- Delay (echo)
- Output (with scope to see the sound)

In-app purchase the full version ($5 US) to remove ads, expand polyphony (from 3 voices to 10), unlock advanced capabilities, and access these additional modules:
- Arpeggiator for sequential playing of the notes in a chord
- Melody for more complex sequences of notes
- MultiOsc for strings and other chorus sounds,
- Unison for more complex chorusing,
- Operator for building FM synthesis,
- PCM for sampled sounds (WAV and SF2 SoundFont files),
- Reverb for simulating room acoustics.
- Crusher for adding digital distortion.
- Compressor to combine all voices and even the sound levels
- Pan to direct sound to either left or right stereo channels.
- SpectralFilter to control the spectrum of a sound with a bank of 25 bandpass filters
- Function module allowing entry of an arithmetic expression for the module's functionThe full version also provides the ability to record sounds to a WAV file.

ModSynth has USB MIDI support for external MIDI keyboards, including mapping of controls to CCs. It has low latency on devices supporting Android low latency (such as Nexus). All oscillators are anti-aliased, providing low distortion at higher frequencies.

A guide to using ModSynth can be found at http://bjowings.weebly.com/modsynth.html .

A VST plugin is available to run ModSynth created instruments on VST hosts on Windows. See http://bjowings.weebly.com/modsynthvst.html for the free download and instructions.

Category : Music & Audio

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Reviews (28)

T. J. May 26, 2022     

For the discriminating synthesizer creator/player, this thing is very impressive and the sounds are excellent. I thought I had an issue with the output through headphones and the developer got right on it to resolve an issue I should have noticed (nothing to do with the app at all). Anyway, because you have to "patch" modules together to make noises/sounds/music, this may not be everyone' cup of tea (in which case I can highly recommend the developer's other app, Easy Synth), but, for me, most of the fun lies with experimenting on patching the various modules in different ways. And the sounds I have been able to create are insane in the best way possible.

Tim. B. Jan 27, 2022     

When I select to add another module, there is no way of going back to the keyboard. It's stuck on that screen, no buttons to select... Nothing! Only thing I can do is select back on my device.... Which then closes the app all together. Such a shame because the easysynth is fantastic. This has a massive flaw rendering it useless unless Im happy just playing the pre-sets.. which I'm not. I want to add modules & experiment, that's what this app is all about.

Bri. W. Oct 5, 2018     

This app is excellent and support from developer is great. Very low latency on a modern, mid-class device and works with MIDI and audio interfaces simultaneously via OTG. Can also use MIDI when Android device connected to a host which allows for powering device also. User interface is simple and intuitive and sound quality is good. There is room for improvement but developer responds to feedback and delivers bug fixes and enhancements promptly. An extensive set of modules gives a lot of flexibility. The free version is great but for just a little cash you get a lot more features and contribute towards improving the app further. I tried most similar apps and this is the best in its class. Caustic is similarly good but has a different feature set, so I bought both.

Mar. P. Jun 2, 2019     

This is a wonderfully rich tool for creative exploration. I use it regularly in gigs as a secondary sound source. There're some shortcomings, of course - not very sleek, workman-like UI; unpredictable buffer hick-ups when doing self-modulating patches with extreme values; parameter values could be labeled in more contextually relevant way (instead of 0-100); which keeps it from being straight 5*. Still, very worthwile and powerful for a phone app.

Poo. Dec 29, 2018     

Great app. This is a great app for making leads, pads, basses, soundscapes and even whole songs. I have but two complaints, the filter's resonance is really hard to tame and the fact that reverb is a paid feature. Other than that fantastic app and well worth the five dollars!

And. W. Mar 24, 2019     

ModSynth offers a shocking amount of depth for a synth that runs a phone. It's a truly wonderful synth that doesn't compromise on quality of sound or capability. I've been using soft modulars for 18 years, but have never seen an implementation of polyphony in modular that worked so well as Modsynth.

Bam. A. Sep 30, 2019     

A great way to explore sound without needing 3,500 pounds of gear & 17 miles worth of cable. Even the starter pack has tons of potential. Would love to learn the full version but so far it has frozen/reset my phone (G8 ThinQ) several times. Any thoughts? Thanks

Gin. M. Jul 28, 2019     

Has potential but the UI needs work. Didnt get too much into it because I couldn't get modules to link together. If I can't figure basic functionality out intuitively, i don't have time for the app.

Pau. C. Feb 22, 2019     

OMG finally found something I can plug my EWI-USB into!!! Setting breath control CC to control amp volume is super easy. <3333 Still exploring but so far $5 is a steal considering I've been looking for a solution for years.

Ter. B. Dec 10, 2019     

Just what I was trying to find. Connecting modules took a while to figure out. I wish port names showed up after being connected. My favorite builtin instrument to mess with is formant.

Afk. May 13, 2019     

this synth is very awesome but the resonance is kinda harsh and noisy but other than that very intuitive I learned it in an instant and the presets really help with learning totally recommend this to anyone who is into music

epa. Nov 1, 2018     

Stunning! This is the kind of future electro folk computer music tool that Kraftwerk, Devo, and the Human League wrote songs about! Audio and MIDI performance is responsive with my cheap battery powered Behringer UMA25s keyboard (integrated USB audio/midi interface) with an OTG cable to drive a $200. Asus tablet. Has among the lowest latency of all the music tools I use on Android. Very playable and rather Punk. Don't expect Arturia, Reason or Caustic's style of modular synthesis or GUI style. ModSynth is more like going under the hood of Reaktor, and more so reminds me of Digidesign's 'Turbosynth' Mac synthesis program from the early 90's - except ModSynth is realtime and playable without having to render, save, load and key map into SampleCell or other sampler. ModSynth has been well supported with new features added over time, and I just discovered the free Windows VST plugin that loads ModSynth patches. Adds further to the TurboSynth vibe! With a cost less than a box of floppy disks - fantastic!

Rij. Aug 3, 2020     

Dope. Automatically connects to The Metronome by Soundbrenner when MIDI is on, which instantly blocks the keyboard even though it isn't one. Otherwise super cool, I'm gonna have fun.

Doi. S. Oct 16, 2020     

I've been using easysynth for quite some time. Believe me, if you are new to modular synthesis or cannot afford the modules(like me)...here is a nice substitute. Carry on dev...looking forward to see more such apps in near future.

Ivo. H. May 18, 2021     

It's lots of fun experimenting and creating synth patches with this app's visual editor. Works great with my Akai EWI USB controller or a regular MIDI keyboard.

Kei. V. Feb 28, 2020     

Everything has worked very well so far. This is a great modular synth app for coming to grips with how patches work.

Tre. M. Jul 1, 2019     

Fun! NB: I'm not a professional musician, but this app is fun to play with. The engineer in me loves the "flowchart" layout and how one just clicks-on an element to adjust its parameters.

Arg. P. Dec 14, 2019     

Excellent! Exactly what I was looking for!!!! GL dynamic environment and too comfortable for infinite improvisation! Great work!

A.. B. Sep 30, 2018     

Awesome app! Contemplating getting the full version, only hesitant as I'm already trying to unplug from the Digital World, so... Good luck with that, right? LOL

K. Z. Dec 23, 2019     

The Ui is ugly and it doesnt have much of a DAW intergrated for making music and 5 dollars seems steep for the full version. Waiting on a sale. The full version might be better idk if its worth 5 tho

Waf. S. May 6, 2021     

Keyboard immediately disappeared, leaving me with nothing to work with. I opened closed multiple times, same thing.

Tre. H. Oct 16, 2019     

Doesn't do anything!!! No onscreen keyboard, no response to midi, just a pointless screen and a button to buy the full version... Pretty stupid app... Deleted!

D.S. B. Nov 3, 2019     

the whole keyboard/keys/app freezes up when output cord is placed into auxillary port. cannot be used with amp or computer

Jim. V. May 13, 2021     

5 minute and you win my appreciation. Amazing tool. Everycircuit for music. Genius.

noo. a. Mar 29, 2020     

Very very bad its stupid and it looks like it came from 1950 bo matter you add or remove something the sound doesnt change ... i don't recommend this at all !!

Ell. A. Feb 7, 2019     

Great synth. Works well with Arturia Keystep. Would give 5 stars but the record function doesn't work on my OnePlus 6.

Ši. Š. Sep 21, 2018     

Pretty much like 3x oscilator plugin in FL Studio but more advanced. Great job

gha. l. Jan 10, 2022     

I can't buy it(service connection disconnected) and I can't record anything