I have just wrote some info on this Wiki (about Renoise for example 
feel free to edit that article )
http://en.wikipedia.org/wiki/Tracker
One thing I’m realy uncertain about though is that the Atari ST-tracker also was released on the Amiga. I have never heard about it but one guy still assert the oposit. Can somebody confirm or dismiss this information? I can’t find any infor about an amiga version, only info about player routines to play AS-mod on the amiga.
google 
http://ermagro.web.ctonet.it/applicazioni.htm
I assume the audio sculpture listed there is what you’re looking for…
Thank you 
I’ll unpack this file when I’ll home from work and check so this isn’t just anather pack of the player routines.
I infact searched google pretty much but didn’t find much info.
Here for example is sites from Sync, the creators of AS and not even there you can read anything about a Amiga version.
http://www.sync.st/page3.html
http://www.lysator.liu.se/~celeborn/sync/page3.html
If there was an Amiga version it can not have been very popular…