Am Montag, den 26.02.2007, 19:18 +0100 schrieb Pieter Palmers: > PS: tell me that these already exist, so that I don't have to start my > own private projects: 'AbletonLive4Linux', a decent arpeggiator (I can't > seem to grasp QMidiArp), 'lock-jack-transport-to-tha-captured-beat'. That's something I've been thinking about for quite a while now. I'm planning to write a Jack Timebase Master which listens to an input port analyzing the stream and tracking the beat. MIDI Clock output would be next. My motivation is to sync seq24 & Co. to live drums. aubio comes with a causal beat tracker but my first attempts with it were not very promising. Causal beat tracking, however, is by no means trivial. Especially if you do not know the kind of the input signal, e. g. drums vs. a violin. I did a little bit of state of the art research, so all I can provide for now is a bunch of papers (and a project name FWIW). Should you decide to start your own project on this, please get in touch with me (LAC2007?). Jan