Unable to find fluidsynth.dll

[Yorgg]

I'm having some trouble connecting to the fluidsynth.dll.

steps:

1. I build the .dll on Windows using msys2: https://github.com/FluidSynth/fluidsynth/wiki/BuildingWithCMake#building-with-msys2-on-windows

2. Then on /build/src/ I find libfluidsynth-2.dll (this the correct .dll file I hope?)

3. I copy this file into my Unity Assets folder, and rename it to fluidsynth.dll

4. On Unity I get a DllNotFound exception: fluidsynth.

I tried this with fluidsynths versions 2.1.3, and 2.0.8.

Do you know what I'm doing wrong here? thanks!

[atsushieno]

I haven't written any code with Unity so I barely have ideas, but looks like the directory structure is more complicated than just putting the files directly into Unity Assets folder? : https://ericeastwood.com/blog/17/unity-and-dlls-c-managed-and-c-unmanaged

I believe that fuildsynth.dll filename is correct.

[Yorgg]

Thanks for the response. I wanted to be sure that I am using the correct .dll file.

This is the file I'm using (highlighted):

I think its loading the .dll - as I am also getting the error: Plugins: Failed to load 'Assets/Plugins/fluidsynth.dll' because one or more of its dependencies could not be loaded

[atsushieno]

Wasn't fluidsynth dependent on glib-2.0 etc. ? Unless all those dependencies are statically linked, they also have to be there.

[Yorgg]

I used https://github.com/lucasg/Dependencies and found 13 dependencies.
The error message has disappeared. Thanks!

[Yorgg]

By the way, I cannot hear audio when I make a noteon event. :/

I think this is probably a Unity+fluidsynth issue, so I made post on fluidsynth repo.

Would you have any idea what the issue is?

 using (var settings = new NFluidsynth.Settings())  {              
    settings[ConfigurationKeys.SynthAudioChannels].IntValue = 2;
    using (var syn = new Synth(settings)) {
      syn.LoadSoundFont("/usr/share/sounds/pathtoyoursoundfont.sf2", true);
      for (int i = 0; i < 16; i++)
        syn.SoundFontSelect(i, 1);
                   
      using (var adriver = new AudioDriver(syn.Settings, syn)) {
         syn.ProgramChange(0, 0);
         syn.NoteOn(0, 60, 120);    // cannot hear audio here :( 
      }
    }
}

[atsushieno]

Try applicable audio drivers that works on your machine? Like this https://github.com/atsushieno/nfluidsynth/blob/master/NFluidsynth.Sample/Program.cs#L15

[Yorgg]

I tried all the Windows' audio drivers, but no luck.
The audio works fine when I open fluidsynth.exe outside of Unity - so maybe the issue is related to the Unity environment.
Hmm...

[Yorgg]

I realized the sound wasn't working because the audio driver was immediately being disposed. Problem fixed!