On 11/01/2014 08:10 PM, Clemens Ladisch wrote: > hermann meyer wrote: >> I try to fetch the bpm from the Midi Clock, and stumble over "jitter". >> >> How do you usually fetch the bpm from Midi Clock, any pointer will be >> welcome. > > <http://en.wikipedia.org/wiki/Phase-locked_loop> > <http://en.wikipedia.org/wiki/Kalman_filter> > > MIDI clock is interesting, because deviations from the predicted clock > frequency are either errors and must be suppressed, or are because of > a change in tempo and must replace the old clock rate. >
A very good paper with example code: http://kokkinizita.linuxaudio.org/papers/usingdll.pdf (ardour uses that approach to filter MTC, LTC and MClk) ciao, robin _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
