[fluid-dev] Default soundfont file: synth.default-soundfont

[David Henningsson]

I just pushed two commits to trunk that enables us to load a default 
soundfont file if none specified, as discussed two years ago [1].

The default soundfont file is a setting ("synth.default-soundfont"), and 
its default can in turn be customised in CMake.

Our upstream default is currently /usr/share/soundfonts/default.sf2, 
except on Windows where it is C:\soundfonts\default.sf2. I don't mind 
better suggestions (especially for Windows) if you have any.

The current logic is such that the default soundfont will be 
automatically loaded if
 1) invoked by the fluidsynth executable. Users of the fluidsynth 
library will not be affected, although they could read the setting and 
load that file if they wish.
 2) there is a midi file specified for playback
 3) there are no soundfonts specified for loading (or possibly if they 
failed to load)

I hope this would be smart enough to not load the default soundfont if 
not expected to. If a user of the fluidsynth executable wants to make 
absolutely sure the default soundfont is never loaded, (s)he can 
override the setting to "" (empty string).

// David

[1] lists.nongnu.org/archive/html/fluid-dev/2011-09/msg00036.html