Failed to open Alsa device "hw:1,0" no such file or directory

[Deenoo]

Hi & Help
MoOde 6.3, when pluged in Burson Playmate USB audio device, and start the play the MPD sent this error message: Failed to open Alsa device "hw:1,0" no such file or directory.
Before that I used "Ian Fifo II" setting with another I2S connector DAC without problems.
How can I write back the ALSA device hw:1,0 to hw:0,0?
Thank you!
D'

[Tim Curtis]

USB DAC's are assigned card1 (hw:1,0) by moOde. Card0 (hw:0,0) is used for I2S DAC's and the On-board Pi audio device.

The error "Failed to open Alsa device "hw:1,0" no such file or directory." suggests that Linux/ALSA has not recognized the USB DAC.

[Deenoo]

USB DAC's are assigned card1 (hw:1,0) by moOde. Card0 (hw:0,0) is used for I2S DAC's and the On-board Pi audio device.

The error "Failed to open Alsa device "hw:1,0" no such file or directory." suggests that Linux/ALSA has not recognized the USB DAC.

MoOde 5.3 recognized before
When I change back to IanFifoII, MPD gave the same error message.

[Tim Curtis]

If you are switching between USB and I2S audio devices you need to open MPD Config and verify that the "Device type" is correct then SAVE the config.

[Deenoo]

If you are switching between USB and I2S audio devices you need to open MPD Config and verify that the "Device type" is correct then SAVE the config.

Thank you Tim!

[Deenoo]

If you are switching between USB and I2S audio devices you need to open MPD Config and verify that the "Device type" is correct then SAVE the config.

Is there a difference between 5.3 and 6.3 of Mood that part to handles USB audio devices?
Because the previous version (5.3) of MoOd recognizes my USB DAC device and 6.3 doesn't.
I reinstalled 6.3 and the same error message appears "Failed to open Alsa device "hw:1,0" no such file or directory."
Strange

[Tim Curtis]

Yes, different release of Raspbian and Linux kernel. There are probably changes made by the Raspbian or kernel devs to the Linux usb-audio driver. I generally don't track those kind of things due to lack of time but you could search the link below for issues.
https://github.com/raspberrypi/linux/issues

The moOde 6 series is based on the recently released Raspbian Buster Lite which is required for supporting the new Pi-4B.

You can track which version of Raspbian is used in moOde releases by viewing the mosbuild repo
https://github.com/moode-player/mosbuild/releases

You can track which Linux kernel is used by viewing the release notes
https://github.com/moode-player/moode/bl...lnotes.txt

You also might want to run the cmd below to see if there is any indication why the USB device doesn't;t appear to be recognized.

Code:

lsusb

[Deenoo]

Yes, different release of Raspbian and Linux kernel. There are probably changes made by the Raspbian or kernel devs to the Linux usb-audio driver. I generally don't track those kind of things due to lack of time but you could search the link below for issues.
https://github.com/raspberrypi/linux/issues

The moOde 6 series is based on the recently released Raspbian Buster Lite which is required for supporting the new Pi-4B.

You can track which version of Raspbian is used in moOde releases by viewing the mosbuild repo
https://github.com/moode-player/mosbuild/releases

You can track which Linux kernel is used by viewing the release notes
https://github.com/moode-player/moode/bl...lnotes.txt

You also might want to run the cmd below to see if there is any indication why the USB device doesn't;t appear to be recognized.

Code:

lsusb

Thank you again Tim!
Until find out what the problem is, I am using the 5.31 MoOd with great satisfaction

[TheOldPresbyope]

@Deenoo

Interesting problem.

I have three USB audio devices


- an old C-Media CM108 USB to headphone adapter (e.g., 3.5mm analog audio out)
- a Creative Technology W2 USB-BT audio adapter
- a Khadas Tone Board

The USB device-tree information returned for these three by lsusb -v differs in details but in every case includes an interface class "Audio"

Code:

# In each case, I found the -d vendor:device codes by running lsusb without options
pi@moode3a:~ $ sudo lsusb -v -d 041e:3125|grep Audio
  iProduct                2 Creative Bluetooth Audio W2
      bInterfaceClass         1 Audio
...

pi@moode4b:~ $ lsusb -v -d 0d8c:013c|grep Audio
Couldn't open device, some information will be missing
Bus 001 Device 003: ID 0d8c:013c C-Media Electronics, Inc. CM108 Audio Controller
 idProduct          0x013c CM108 Audio Controller
     bInterfaceClass         1 Audio
...

# the iProduct string for the Khadas, not seen here, occurs later in the output
pi@moodelr:~ $ lsusb -v -d 20b1:000a|grep Audio
Couldn't open device, some information will be missing  ### can be ignored for this test
      bFunctionClass          1 Audio
      bInterfaceClass         1 Audio
...

More fundamentally, each of these devices was detected by the kernel as an audio device. For example, in the case of the Khadas Tone Board

Code:

pi@moodelr:~ $ dmesg|grep usb
... skipping all the lines about other USB devices detected
[    1.591733] usb 1-1.4: new high-speed USB device number 4 using xhci_hcd
[    1.722664] usb 1-1.4: New USB device found, idVendor=20b1, idProduct=000a, bcdDevice= 1.04
[    1.722708] usb 1-1.4: New USB device strings: Mfr=1, Product=3, SerialNumber=0
[    1.722741] usb 1-1.4: Product: Khadas Tone Control
[    1.722766] usb 1-1.4: Manufacturer: XMOS
[    5.722687] usbcore: registered new interface driver brcmfmac
[    5.848004] usb 1-1.4: 1:3 : unsupported format bits 0x100000000
[    5.853859] usbcore: registered new interface driver snd-usb-audio

If you don't see that last line then the Linux kernel isn't recognizing your Playmate. That's something for Burson to work out with the Linux developers.

Regards,
Kent

[Deenoo]

Hi Kent

I found this
[    4.036087] usb 1-1.2.2: New USB device strings: Mfr=1, Product=3, SerialNumber=0
[    4.046048] usb 1-1.2.2: Product: BursonAudio USB Audio 2.0
[    4.054031] usb 1-1.2.2: Manufacturer: XMOS
[    4.121906] usb 1-1.1.1: new high-speed USB device number 8 using dwc_otg
[    4.252389] usb 1-1.1.1: New USB device found, idVendor=0424, idProduct=7800, bcdDevice= 3.00
[    4.265258] usb 1-1.1.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    6.629683] usbcore: registered new interface driver uas
[    6.806882] usb 1-1.2.2: 1:3 : unsupported format bits 0x100000000
[    6.810431] usbcore: registered new interface driver snd-usb-audio
The error message remained "Failed to open Alsa device "hw:1,0" no such file or directory."

Audio Information
Audio Device
Device: USB audio device
Chip:
Interface: USB
Formats: U8, S16_LE
Platform: Pi-3B+ 1GB v1.3