Thank you for your answer! 
 
	Now I have to see what I can do with it.
 
	What else do I need if I want to play MIDI files and make music with a MIDI keyboard? 
 
	I still have various boards, such as raspberry pi 4, Arduino, etc. 
 
	In addition, I have two SIDs from the C64 and one from the AMIGA (PAULA) 
 
	I would like to be able to play and play shift types of music. 
 
	Prodigy, AMIGA themes, instrumental music and 80s Synthesizer music. 
 
	Play yourself (keyboard) and play (MIDI/MOD files) 
 
	I know this is quite complex, but maybe one of you knows how to realize this. 
 
	Best regards 
 
	Thimo
 
	(should I start a new topic whith this question?)