I hope this isn't too off-topic.

I run an open source project (GENPO) which can be thought of as a kind of MIDI switchboard and filter. It uses ALSA throughout. I'd like to add a new feature to the software - a facility to simply record to a standard MIDI file anything that the program produces. I've searched though the API and I can't find anything documented which will help much, so here's my question...

Is there a recommended library for C++ ALSA programs to use for handling (writing) standard MIDI files?

Regards, Steve