-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 16.02.2015 18:36, Harry van Haaren wrote: > No, the MIDI "cable" baud rate is 31250, while MIDI over USB runs > at 112500. Its faster - but there are still limitations. Where do these 112500 Baud come from? Just curious... Does this refer to low-speed USB-MIDI (e.g. 1.5Mbit/s)? e.g. 112500 Baud = 1.5Mbit/s / 8bit * 3/4 * 0.8 3/4: USB-MIDI prepends 1 byte to every raw MIDI 3-bytes [1] 0.8: -20% USB bus overhead ??? > Regarding the above: -Sequentially handled: yes Not necessarily. USB is packet based and USB-MIDI uses bulk-transfers with a maximal packet size of 64Bytes. A common 3-byte MIDI instruction packed in a 4-byte USB-MIDI instruction thus gives you 16=64/4 possible concurrent events. Whether those concurrent events will be treated as such by a host is another matter... high-speed USB has a maximal packet size for bulk transfers of 512 bytes, I'm not sure though whether this applies to USB-MIDI, too? > -Bandwidth: lots better than DIN-cable MIDI, but limited Depends on underlying USB speed, I guess low-speed (1.5Mbit/s) vs full-speed (12Mbit/s) vs high-speed (480Mbit/s) > >> 2. I had not heard of MIDI-over-OSC. > You can also do OSC-over-MIDI via sysex messages ;-) > Yes - almost everything is possible with OSC - any form of data can > be passed around as a "blob" of binary data, timestamps are > available to be used for timing, and "bundles" can be used to have > multiple events be processed at exactly the same time. > > Sequential handling? Yes - unless in a bundle. Bandwidth: > unlimited. Just like MIDI, OSC's maximal bandwidth is limited by its underlying communication layer [2]. You may send OSC via UDP/TCP on Gigabit LAN. But people do pack it into USB and Serial, too. /bye0000,s00hp00 [1] http://www.usb.org/developers/docs/devclass_docs/midi10.pdf [2] http://nime2008.casapaganini.org/documents/Proceedings/Papers/163.pdf _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
