On Aug 18, 2004, at 12:38 PM, linux-audio-dev-request(a)music.columbia.edu wrote: One way to do this is to have a multi-stream session, with one of the sessions being RTP MIDI, that uses System Exclusive commands to do MTC, or MIDI sequencer, or MMC to do your timing. So, this would recreate the current hardwired world, but using RTP MIDI to do pseudo-wire emulation of the MIDI cable carrying MTC ... the RTP RTCP stream would have NTP, as would all the audio RTP streams, and the receiver uses these common NTP timestamps to derive cross-sync between the MTC sync information in RTP MIDI and the RTP timestamps on the audio stream. Of course, this only works as well as your NTP sync ... in an ideal world, a single server generates these streams off of a single NTP clock, or at least you have a very good NTP daemon keeping things in sync. Roger Dannenberg gave a good talk on these issues at the OSC-fest here at Berkeley last month ... --- John Lazzaro http://www.cs.berkeley.edu/~lazzaro lazzaro [at] cs [dot] berkeley [dot] edu ---