Hi!

On Mon, Jul 19, 2010 at 12:52 PM, Joan Quintana <joan_quintana@yahoo.com> wrote:
I want to implement an idea. In stead of playing along with my wind midi controller the leading track with the rest of midi tracks (being slave of the midi tempo), I would to program another way to play a midi file:

playing the lead track generate all the events of the rest of the tracks. In this case the concept of the tempo changes, and need to be calculated continuously to trigger the events. With this idea I will be free to play the melody, and feel how the orchestra (the other tracks) follow me, and not me following the orchestra (play along).

Is this a crazy idea? Could be feasible to program? Exist already something similar?

Yep something similar exists. Check out the following 2 links:
Send MTC from JACK transport:   http://www.teuton.org/~gabriel/jack_midi_clock/
Live JACK transport "adjustment": http://www.teuton.org/~gabriel/InConcert/

I'm not the author of either project, and have not tried either project. I belive they are currently under development, but I'd reccomend at least checking out the sources, and chatting to the -dev.

Cheers, -Harry