So the behaviour is the same on the Csound for Android app, I believe there are issues when selecting the presets.
The general soundfont from MuseScore works setting preset 0 on the Unity Editor with CsoundUnity 3.4.1, on CsoundQT 1.1.1.
It fails playing anything on the Csound for Android app (and of course if building an apk using Unity and CsoundUnity).
Here I’m switching preset every 8 notes. Works fine on pc, but not on Android.
You can toggle the comments on the first lines to choose which sound file to load.
TestSoundFonts_Android.csd (1.4 KB)
[EDIT] You might want to place the csd and the sf files in the Music/Csound folder, as I had some permission issues with the latest Csound for Android version, so the path to use could be something like this:
gisf sfload "/storage/emulated/0/Music/Csound/sf_GMbank.sf2"
Before opening an issue on the Csound repo I want to replicate it using the Csound for Android project from there (even if I know already it will be a pain)

