The python converter of MIDI music files written by Michael Wessel in python is availabe. It let you play MIDI files on an Amstrad CPC with two hardware expansions :

• The Ultimate CPC MIDI Sound & MIDI Interface Card by LambadMikel
• Willy which can use either a S2P by Serdashop to use MIDI or the OPL3LPT by Serdashop to play adlib music with SA2 Surprise! Adlib Tracker by Madram and a VGM player by PulkoMandy

Source of the MIDI player in Z80 assembly is available.