On November 1, 2009 12:55:44 pm you wrote: > On Sun, 2009-11-01 at 12:56 -0400, Raymond Martin wrote: > > 15 meters is a recommendation based on typical cables used in a simple > > system. Data corruption ensues somewhere after 15m, depending on cable > > quality, EMI, and so forth. I would imagine a CAT5 as having better > > shielding and IIRC runs for that are advised to somewhere up to 50m. > > Different frequency ranges though, so signal loss/degradation per meter > > may vary. > > My recollection is that when MIDI was originally standardised, they > needed to specify a maximum length, and that 15M was chosen somewhat > arbitrarily (No tests were done, no eye patterns examined). > > Now midi is actually at heart a 5mA current loop interface running at a > fairly low baud rate (31.25 Kbaud IIRC), so should be good for far more > then 15m without any problem, however nobody really knows and it will > depend a bit on the environment and the receiver. > > Interference is unlikely to be an issue assuming good quality twisted > pair cable (Cat 5 counts), but bulk capacitance just might ultimately > limit the length. >
Check MIDI manufacturers association pages, specifically: http://www.midi.org/aboutmidi/tut_midicables.php At the bottom it talks abut MIDI over Ethernet, with links. Cheers, Raymond _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/mailman/listinfo/linux-audio-dev
