Re: [linux-audio-user] Midi Usb interface

From: Clemens Ladisch <clemens@email-addr-hidden>
Date: Fri Jun 10 2005 - 18:12:53 EEST

Jay Vaughan wrote:
> amidi -l:
> Device Name
> hw:1,0,0 MidiSort 2x2 MIDI 1
> hw:1,0,1 MidiSort 2x2 MIDI 2

Does it really say "MidiSort" without "p"? :-)

> ls -l /dev/midi
> crw-rw---- 1 root audio 14,18 Jun 10 13:05 /dev/midi1
> i think udev is only creating one dev node, when it should be
> creating two ..

There is a limit of eight MIDI devices per card, so the snd-usb-audio
driver makes multiple ports available as subdevices that are
multiplexed through one device node. This works fine when using the
ALSA API, but the OSS API is too simple for that. (Using /dev/midi01
will open the first free subdevice.)

You can load the snd-virmidi driver and connect its ports to the
MidiSport ports. (This works for any sequencer ports that you want to
access as an OSS /dev/midi* file).

> i'll try the ez-usb-midi loader next and see if that helps ..

This isn't a firmware issue.

Received on Fri Jun 10 20:15:07 2005

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