Meridian has a 16-part MIDI-approach, where a note in the tracker may or may not use more than one channel. Oh, and there's the deltasteptime stuff of course
FST pro has also MIDI ..
it's not the answer 
the SCC was not what I was aiming for.. in fact: forgot about the chips..
Another guess: Wolf_ never used an Hayo production, but he did play with the other trackers...
No, it's Hayo.
FST uses horizontal input... the other don. . . AH DAMN, meridian does also.
Although Meridian has a very "strange" input mode, it's also the most recent tracker. So I'm betting on the Meridian coder
RMF megademo and RMF musicdisk1 were done with fst pro 
At a certain point I could operate FST pro without a monitor, purely navigating on sound and memory..
Even though Meridian only displays 1 event, more events can be added to it...
SCC-MUSIXX is probably the only tracker wolfie mentioned he didn't make tunes on...
still not what I've been looking for.. (never released scc-musixx songs, dabbled a bit with it, but I didn't like it much)
Apart from that, I didn't mention scc-musixx in the question, so if I mention 'michiel spoor', it's also about protracker, not just scc musixx
+ the qustion is not related to me or any other composer
pro tracker's the only purely MSXMUSIC editor
protracker is the only name that exists on another platform outside of msx, namely the amiga ?
poke, nope. Quess where the FAC (federation against Commodore) took the name Fasttracker from...
