[LAU] MIDI-controller treated as audio device

[Michael Jarosch]

Am 04.12.20 um 17:49 schrieb 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
Ah, okay!
> 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
id  midi0  oss_mixer  usbbus  usbid


oss_mixer looks suspicious…

Greets!
Mitsch