I have a Line 6 Helix (guitar multi-effects pedal) that acts as an audio
interface over USB. Although it is listed as a sound card:
~$ cat /proc/asound/cards
0 [Loopback ]: Loopback - Loopback
Loopback 1
1 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xf7080000 irq 304
2 [Generic ]: HDA-Intel - HD-Audio Generic
HD-Audio Generic at 0xf7700000 irq 306
3 [Alpha ]: USB-Audio - Lexicon Alpha
Lexicon Lexicon Alpha at usb-0000:03:00.0-2, full speed
4 [HELIX ]: USB-Audio - HELIX
LINE 6 HELIX at usb-0000:03:00.0-1, high speed
it is not recognized as an audio device:
~$ cat /proc/asound/pcm
00-00: Loopback PCM : Loopback PCM : playback 8 : capture 8
00-01: Loopback PCM : Loopback PCM : playback 8 : capture 8
01-03: HDMI 0 : HDMI 0 : playback 1
01-07: HDMI 0 : HDMI 0 : playback 1
01-08: HDMI 0 : HDMI 0 : playback 1
01-09: HDMI 0 : HDMI 0 : playback 1
02-00: ALC887-VD Analog : ALC887-VD Analog : playback 1 : capture 1
02-01: ALC887-VD Digital : ALC887-VD Digital : playback 1
02-02: ALC887-VD Alt Analog : ALC887-VD Alt Analog : capture 1
03-00: USB Audio : USB Audio : playback 1 : capture 1
I think the issue can be seen in dmesg:
[74449.448191] usb 1-1: new high-speed USB device number 8 using xhci_hcd
[74449.651241] usb 1-1: New USB device found, idVendor=0e41, idProduct=4244
[74449.651245] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[74449.651247] usb 1-1: Product: HELIX
[74449.651249] usb 1-1: Manufacturer: LINE 6
[74449.651250] usb 1-1: SerialNumber: 2804389
[74449.673547] usb 1-1: parse_audio_format_rates_v2(): unable to
retrieve number of sample rates (clock 16)
[74449.677222] usb 1-1: parse_audio_format_rates_v2(): unable to
retrieve number of sample rates (clock 16)
Is there an easy fix to get it working?
Thanks
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