FluidSynth MIDI Synthesizer has 240 thousand installs. Users are divided: 3.9 stars from 1,087 ratings. Show more ›
FluidSynth MIDI Synthesizer is made and published by
Volcano Mobile SNC.
AppBrain is an independent app data site and isn't affiliated with Volcano Mobile SNC.
The app name, icon, screenshots and description belong to Volcano Mobile SNC and are shown as
published on Google Play.
Pros & Cons
FluidSynth-based synthesis for flexible MIDI sounds
SoundFont (.sf2) support for broad sonic options
MIDI hardware compatibility via USB OTG for real-time play
WAV recording of performances for easy sharing and editing
Open-source FluidSynth core provides transparency and community input
Requires external SoundFonts to function effectively; no built-in SoundFont bundled
Broad permission set (including location and ad IDs) may raise privacy considerations
No explicit on-screen keyboard or virtual instrument UI indicated in the data
About FluidSynth MIDI Synthesizer
FluidSynth MIDI Synthesizer is a music & audio app developed by Volcano Mobile SNC.
Install Statistics
FluidSynth MIDI Synthesizer has been installed 240 thousand times. In the last 30 days, the app was installed 3.7 thousand times.
User Ratings
FluidSynth MIDI Synthesizer is rated 3.93 out of 5 stars. The rating is based on 1.1 thousand ratings.
App Information
FluidSynth MIDI Synthesizer is freely available from Google Play. The app size is 15.15 MB. The latest version available is 2.0.35. The last update was on October 28, 2025.
Technical Requirements
FluidSynth MIDI Synthesizer requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since October 2016.
Description by Volcano Mobile SNC(from Google Play)
NOTE: A SoundFont (.sf2) is required to use this synthesizer.
Plug your device to your computer, or hook a MIDI USB master keyboard via an OTG cable to play with this low-latency FluidSynth 2.1.7 based Synthesizer.
- load SoundFont 2 - record your performances directly in WAVE files
This application uses a modified version of FluidSynth, you can find the source code here https://github.com/VolcanoMobile/fluidsynth-android
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Comments on FluidSynth MIDI Synthesizer for Android
★★★★★nylesteiner· Oct 4, 2025
I give this app 10 stars but rating system only supports 5. This app plays all my sound fonts perfectly with filter and all midi controls etc. Working exactly as I set them up and with very low latency Wow!!!!! Only problem is no reverb. Fix that, and I will give you15 stars Reverb works fine and sounds very good now that I realized left channel reverb was cancelling right channel reverb. Setting the reverb width to zero fixed this and now all is well with the reverb.
★★★★☆Bri Dono· Mar 11, 2023
Love the responsiveness (no latency) between keyboard and output. The app recognizes all the main midi commands. There's still plenty of SF2 sounds out there to take advantage of. The only issue is that I have been unable to find a way to delete any individual sound font. If you test out a sound font, and then don't like it, I can't delete it. I have to go to the apps data and delete that way, but that deletes all sound fonts. Even with that, I still highly recommend it! - Jack
★★☆☆☆Alan Dens· Jul 5, 2022
Worked on a Casio WK 200 & Williams electronic keyboard, but I couldn't close the delay in the more than noticeable latency gap. Used it on an Alexis Q88 controller which had much less of a latency gap but worsening crackling in the audio, then the app stopped altogether transmitting through Bluetooth after I unplugged the usb B adapter end out. Will reinstall & see if I can get it going again tho, it had some promise being user-friendly up to a point. Used another device & Alexis Q88 controller
★☆☆☆☆Lucax Lucax· Aug 28, 2026
When you just about to change the polyphony it doesn't work when I changed to 512 the audio crack so bad like my speaker it's broken it happened to 1024 and 2048 it's so annoying to changed to polyphony and suddenly some voices crack appear of nowhere you phone speak it's healty and not damaged what???
★★☆☆☆Kaden Ward· Aug 23, 2021
Was a good app for using a cheaper MIDI keyboard to play a cleaner sound front. New update has started to cause sound to crackle when playing, enough to the point that it's no longer usable. -Tested headphone, headphone aux cable, USB MIDI cable, and sound front file. -Tried disabling audio effects. -Tried changing in app volume.
Google Play Rankings for FluidSynth MIDI Synthesizer
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Technologies used by FluidSynth MIDI Synthesizer
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