It can be useful to save a track as MP3 file.
MusiCAD uses two external programs with corresponding plugin.
- to convert an exported midi file to a wav file: MID2WAV.plugin
- to convert that large wav file into a (ten times smaller) mp3 file: WAV2MP3.plugin
For example, an (external) program that generates mp3 is ffmpeg.
ffmpeg -i sourcefile.wav -acodec libmp3lame resultfile.mp3
Depending on where ffmpeg is installed you will have to edit the WAV2MP3.plugin file.