Will Godfrey <willgodfrey@xxxxxxxxxxxxxxx> writes: > Something just occurred to me. > > Does anyone know if this is transmitted any faster if going computer > to computer rather than between hardware devices. So do you get lower > latency? Computers don't generally act as USB clients but as hosts. This is not Firewire. Not applicable. > Also what about keyboards that work entirely as MIDI over USB > connecting to a computer? USB Low speed is 1.5Mbps and half-duplex. Midi can be transmitted over 16 logical connectors as 32bit packets of bulk data containing a payload of up to 3 bytes. If you've kept up until here, you'll find that this starts sounding fishy but then when trying to exercise all connectors, we'd more likely be using full speed at 12Mbps (I have a Roland UM-4 Midi interface with 4 in and 4 out Midi connectors and it uses full speed) Which is fine as long as we are not sharing the same hub with low speed devices such as mice and keyboards and/or the hub does not have just a single "transaction translator" for USB 1.1 compatibility in which case Midi packets are blocked while the low-speed devices get their data through, So (deep breath) usually you should be fine. There may be rare circumstances when you aren't and they can usually be fixed by connecting things differently. -- David Kastrup _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
