Check out the Integrated Sampling Sequencer on the Motif at www.yamaha.com . You can't take a ISS file from the motif and play on you Triton etc. but it will do what your asking. I think the questions no one has asked yet are:
Why do you want to do this?
What's your application?
What gear are you planning to do it with?
What compatibility do you need with the finished song?

Regards,



------------------
Steve Deming
Assistant Manager
Customer Support Dept.
Pro Audio & Combo Division
Yamaha Corporation of America