Fwd: Re: [PlanetCCRMA] Problems with Quattro MIDI, usb midi

[Sampo Savolainen]

See my post about a month ago about my problems with the quattro. I have
very similar problems with my Quattro.

In short:
  Your problem #1 (distorted recording) 
     This can be fixed by reloading the driver until the card gets
     initialized correctly, then it will record (and play) correctly. 
  Your problem #2 (midi) 
     This is probably caused by having a midi device plugged into your
     Quattro while powering up and loading the drivers. Just disconnect
     all midi cables from the quattro and poweoff/poweron, load drivers 
     and then plug in midi devices. After this, midi should work.

The drivers for the quattro are very flaky at the moment. I'm looking
forward to 2.6.0, because it should have usb fixes and alsa as the standard
sound driver. That way this very isolated issue could get more coverage from
alsa & kernel developers. I have a feeling that this problem is caused by
some sort of mismatch between the alsa version and the everchanging usb
drivers in 2.4.x.


  Sampo

Quoting Steve Haynal <steve@softerhardware.com>:

> Hi,
> 
> I can not get the MIDI on my Quattro usb interface to work.
> 
> cat /proc/asound/card1/midi0  always produces nothing:
> 
> USB Audio Quattro
> 
> Output 0
>     Tx bytes     : 0
> Input 0
>     Rx bytes     : 0
> 
> 
> I know my controller is producing good MIDI data. When I try to send
> MIDI data out via the Quattro from MUSE, I get this error:
> 
> MidiAlsaDevice::putEvent(): midi write error, returns -19 expected 28:
> No such device
> 
> 
> lsmod shows midi-related modules are loaded:
> 
> snd-mpu401-uart         5904   0  [snd-intel8x0]
> snd-rawmidi            20160   0  [snd-seq-midi snd-usb-audio
> snd-mpu401-uart]
> 
> 
> /dev/snd has losts of midi devices.
> 
> 
> cat /proc/asound/devices shows a raw midi device:
> 
>     0: [0- 0]: ctl
>    16: [0- 0]: digital audio playback
>    24: [0- 0]: digital audio capture
>     1:       : sequencer
>    33:       : timer
>    32: [1- 0]: ctl
>    48: [1- 0]: digital audio playback
>    56: [1- 0]: digital audio capture
>    49: [1- 1]: digital audio playback
>    57: [1- 1]: digital audio capture
>    40: [1- 0]: raw midi
> 
> MIDI used to work on my old Mandrake system, which I got rid of. I'm
> running the latest stock PlanetCCRMA (alsa 0.9.6) on Red Hat 9.0 now.
> Any suggestions on how to fix this?
> 
> Thanks,
> 
> Steve Haynal
> 
> 
> 
> 
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