(01-02-2021, 04:18 PM)Tim Curtis Wrote: The output from lsusb shows nothing connected.

To troubleshoot start with just a bare Pi and your USB dac (to rule out some sort of power issue). If lsusb still shows nothing connected then swap in a different Pi for example a 3B+.

(01-02-2021, 07:09 PM)radiooff Wrote: Hi Kent,

...

I did try the bare RPi 4 with the M100 and still got:

Code:

pi@moode:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

...

(01-04-2021, 07:11 PM)ImInTheMoOdeForAudio Wrote: I think your USB DAC is using a VIA-USB controller, so it's visible already (and usuable I assume). I use a Audio-GD DAC and it shows like this in the lsusb output:
....
Bus 001 Device 004: ID 040d:3410 VIA Technologies, Inc.
....
when I installed Moode at first I did not have sound, but for some reason my DAC was not present when I checked with "aplay -l". What I did was the following:

- I changed the /boot/config.txt:
disable_splash=1
disable_overscan=1
hdmi_drive=2
hdmi_blanking=1
hdmi_force_edid_audio=1
hdmi_force_hotplug=1
hdmi_group=0
#dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=audio=on
dtparam=audio=off

after a reboot the internal audio (and i2s overlay for HATs) willl be disabled and my USB DAC showed up then (check this with "aplay -l")

now you should be able to see/select your DAC in the MPD config page in the Moode-browser page as output device. Now before you go on: I had one more issue: when I checked with "aplay -l" my DAC was reported as "card 1" for some reason. This will give a problem when you would like to see the "Audio Info" (in the browser-screen - click on the "M" in the upper right corner and select that option). I solved this as follows:

- I created the file /etc/asound.conf and added this:
pcm.!default {
   type hw
   card 0
}
ctl.!default {
   type hw
   card 0
}

reboot the system once more and check with "aplay -l" if your DAC is seen on "card 0", see my output:
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Audiogd [Audio-gd], device 0: USB Audio [USB Audio]
 Subdevices: 1/1
 Subdevice #0: subdevice #0

now you should be able to see/configure your DAC in the MPD settings page. In theory you should be able to get sound from your DAC, however, in some cases you might run into the UAC2 issue, which means that your music skips or stutters. In the System Config page there is a "USB (UAC2) fix" setting which should do the trick, but this did not work for me (may be a bug, but it can also be an issue with my setup). For me to get it working I added the following to the first line in the /boot/cmdline.txt for this:

dwc_otg.lpm_enable=0 dwc_otg.fiq_fsm_mask=0x3

be sure to add it at the beginning or at the end without a newline (so one long line of text).

you need to reboot in order to get this working.

I hope this will help you


Thank you!

I will keep this under advisement. I have tried to find the card with aplay -l command. My RPi 4 would report 'Pi Headphones' at card 0. I also tried my RPi 3B+ and that would yield an invalid card number error and an ALSA error.

(01-04-2021, 07:38 PM)TheOldPresbyope Wrote:

(01-02-2021, 07:09 PM)radiooff Wrote: Hi Kent,

...

I did try the bare RPi 4 with the M100 and still got:

Code:

pi@moode:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

...

In keeping with the recent reply by ImInTheMoOdeForAudio, you can confirm if this Via Labs device is indeed your DAC interface, by looking to see if it offers audio-related endpoints.

Here's an example using my Khadas Tone Board which implements its USB interface using a XMOS Ltd chip

Code:

pi@moodelr:~ $ lsusb
Bus 002 Device 002: ID 152d:1561 JMicron Technology Corp. / JMicron USA Technology Corp. JMS561U two ports SATA 6Gb/s bridge
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 20b1:000a XMOS Ltd
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

So device ID 20b1:000a

Using lsusb -v to get detail and grep to look just for Audio

Code:

pi@moodelr:~ $ lsusb -v -d 20b1:000a|grep Audio
Couldn't open device, some information will be missing
     bFunctionClass          1 Audio
     bInterfaceClass         1 Audio
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     bInterfaceClass         1 Audio
     bInterfaceClass         1 Audio
     AudioStreaming Interface Descriptor:
     AudioStreaming Interface Descriptor:
       AudioStreaming Endpoint Descriptor:
     bInterfaceClass         1 Audio
     AudioStreaming Interface Descriptor:
     AudioStreaming Interface Descriptor:
       AudioStreaming Endpoint Descriptor:
     bInterfaceClass         1 Audio
     AudioStreaming Interface Descriptor:
     AudioStreaming Interface Descriptor:
       AudioStreaming Endpoint Descriptor:
     bFunctionClass          1 Audio
     bInterfaceClass         1 Audio
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     AudioControl Interface Descriptor:
     bInterfaceClass         1 Audio
     bInterfaceClass         1 Audio
     AudioStreaming Interface Descriptor:
     AudioStreaming Interface Descriptor:
       AudioStreaming Endpoint Descriptor:
     bInterfaceClass         1 Audio
     AudioStreaming Interface Descriptor:
     AudioStreaming Interface Descriptor:
       AudioStreaming Endpoint Descriptor:
     bInterfaceClass         1 Audio
     AudioStreaming Interface Descriptor:
     AudioStreaming Interface Descriptor:
       AudioStreaming Endpoint Descriptor:

In your case, you'd try

Code:

lsusb -v -d 2109:3431

You can leave off the grep'ping to see all the gory details.

Regards,
Kent