[LAU] MIDI-controller treated as audio device

[Len Ovens]

On Fri, 4 Dec 2020, Michael Jarosch wrote:

> Knowing, that the Korg has no audio-abilities, I checked
>
> :~$ cat /proc/asound/cards
>
>  0 [PCH            ]: HDA-Intel - HDA Intel PCH
>                       HDA Intel PCH at 0x4001110000 irq 134
>  1 [Loopback       ]: Loopback - Loopback
>                       Loopback 1
>  2 [DSP            ]: H-DSP - Hammerfall DSP
>                       RME Hammerfall HDSP 9652 at 0xa0100000, irq 17
>  3 [KONTROL49      ]: USB-Audio - KONTROL49
>                       KORG INC. KONTROL49 at usb-0000:00:14.0-2, full speed

Nothing wrong here. It is the same with any USB midi device. I have:

$ cat cards
  0 [M66            ]: ICE1712 - M Audio Delta 66
                       M Audio Delta 66 at 0xc080, irq 19
  1 [AudioPCI       ]: ENS1370 - Ensoniq AudioPCI
                       Ensoniq AudioPCI ENS1370 at 0xc000, irq 16
  2 [PCH            ]: HDA-Intel - HDA Intel PCH
                       HDA Intel PCH at 0xf7c00000 irq 33
  3 [AudioFire12    ]: Fireworks - AudioFire12
                       Echo Digital Audio AudioFire12 v4.8, GUID 
0014860268b568f1 at fw1.0, S400
  4 [UM1G           ]: USB-Audio - UM-1G
                       Roland UM-1G at usb-0000:00:1a.0-1.4, full speed


But:

$ ls UM1G
id  midi0  usbbus  usbid  usbmixer

This shows that this device is a midi device.

A USB device with audio looks like:

$ ls Device
id  pcm0c  pcm0p  stream0  usbbus  usbid  usbmixer

notice the two sub directories: pcm0c  pcm0p  which show this device has 
one capture device (pcm0c) and one playback device (pcm0p).

so what do you see when you do:

:~$ ls /proc/asound/KONTROL49

If there is a pcm* sub directory, maybe look through to see what audio 
device it thinks it has.

--
Len Ovens
www.ovenwerks.net