ftp.nice.ch/pub/next/audio/musickit

MusicKit.4.1.README
 
MusicKit.4.2.NI.bd.gtar.gz
 
MusicKit.4.2.s.gtar.gz
 
libmidi.N.a.gz
 

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.