USB Sound card detected but not usable (NUX MightyPlug)

m00rg · 01-08-2021, 06:14 PM

I have a NUX MightyPlug Guitar amp simulator that has a USB interface to record.
When I plug it in (Ubuntu Studio 20.04.1, kernel 5.4.0-58-lowlatency x86_64 on a i5-7300Hq HP laptop) it is recognised, but attempting to record from it gives:

Code:

arecord -D "hw:2" -c 2 -f s24 -r 44100 -d 2 -v xxxc
Recording WAVE 'xxxc' : Signed 24 bit Little Endian, Rate 44100 Hz, Stereo
arecord: set_params:1314: Broken configuration for this PCM: no configuration available

dmesg on plug in gave:

Code:

[14088.639878] usb 1-1: New USB device found, idVendor=1fc9, idProduct=8260, bcdDevice= 1.00
[14088.639883] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[14088.639887] usb 1-1: Product: MIGHTY PLUG USB
[14088.639890] usb 1-1: Manufacturer: NUX
[14088.639893] usb 1-1: SerialNumber: 2007151403
[14088.642297] usb 1-1: __uac_clock_find_source(): selector reported illegal value, id 40, ret 0
[14088.642307] usb 1-1: parse_audio_format_rates_v2v3(): unable to find clock source (clock -22)
[14088.642681] usb 1-1: __uac_clock_find_source(): selector reported illegal value, id 40, ret 0
[14088.642792] usb 1-1: __uac_clock_find_source(): selector reported illegal value, id 40, ret 0
[14088.643252] usb 1-1: __uac_clock_find_source(): selector reported illegal value, id 40, ret 0
[14088.643260] usb 1-1: parse_audio_format_rates_v2v3(): unable to find clock source (clock -22)
[14088.643691] usb 1-1: __uac_clock_find_source(): selector reported illegal value, id 40, ret 0
[14088.643785] usb 1-1: __uac_clock_find_source(): selector reported illegal value, id 40, ret 0

/proc/asound/cards gives:
0 [PCH ]: HDA-Intel - HDA Intel PCH
HDA Intel PCH at 0xb4428000 irq 134
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xb4000000 irq 17
2 [USB ]: USB-Audio - MIGHTY PLUG USB
NUX MIGHTY PLUG USB at usb-0000:00:14.0-1, high speed

and proc/asound/card2/stream gives
NUX MIGHTY PLUG USB at usb-0000:00:14.0-1, high speed : USB Audio

Playback:
Status: Stop
Interface 1
Altset 1
Format: S32_LE
Channels: 2
Endpoint: 1 OUT (ASYNC)
Rates:
Data packet interval: 1000 us
Bits: 24

Capture:
Status: Stop
Interface 2
Altset 1
Format: S32_LE
Channels: 2
Endpoint: 2 IN (ASYNC)
Rates:
Data packet interval: 1000 us
Bits: 24

I'm happy to give more info, but don't want to make this message too long up-front.

Any idea what is wrong?

Thank you for your help!

RandomTroll · 01-08-2021, 07:54 PM

Run

Code:

alsamixer

. Notice the menu at the top right. Choose 'select sound card': is this one available? Configure in /etc/asound.conf

m00rg · 01-09-2021, 07:46 AM

Hey,

Thank you for your help.
The card appears in alsamixer fine (only the output volume is adjustable, but that's the same as in windows). Is there anything particularly I should add in asound.conf?

Thank you
Pete

RandomTroll · 01-10-2021, 08:59 PM

Quote:

Originally Posted by m00rg

Is there anything particularly I should add in asound.conf?

I don't know what the config for this device should be. 'arecord' reports unhappiness with its PCM configuration. Perhaps fixing that will make it work. Are you sure it supports the parameters you used on the command line? What happens if you omit the unnecessary ones?