Man pages matching name detect_midi_driver in section 3alleg4:

detect_midi_driver.3alleg4.en	debian 10 / allegro4-doc
detect_midi_driver.3alleg4.en	debian 11 / allegro4-doc
detect_midi_driver.3alleg4.en	debian 12 / allegro4-doc
detect_midi_driver.3alleg4.en	debian 13 / allegro4-doc