I am currently trying out GNU Solfege for ear and rhythm training. Solfege uses TiMidity for playback. On my machine, the sound output always started with an annoying crackling for each exercise. Some googling brought up this solution. While that link has nothing to do with Solfege, following its advice helped in my case, too. To remove the crackling in Solfege, I did the following:
- In Solfege, open the
File > PreferencesMenu
Audio File Players - MIDIit should say
/usr/bin/timidity(or something similar)
--output-24bitto the options for that entry (my complete options for timidity are
--output-24bit -idqq %s)
Test Button right next to the options you can try if the fix works for you. Whether or not this works for you probably depends on a lot of factors (your soundcard, versions of of timidity and drivers etc. pp.), but if you have the same problems it is probably worth a try.