Man pages matching name wildmidi_converttomidi in section 3:

WildMidi_ConvertToMidi.3.en	debian 10 / libwildmidi-dev
WildMidi_ConvertToMidi.3.en	debian 11 / libwildmidi-dev
WildMidi_ConvertToMidi.3.en	debian 12 / libwildmidi-dev