USB DAC recognised but can only get sound from analogue

Pi MusicBox
1

Hi guys, I’ve tried everything I could possibly find online to fix this issue and am truly stumped at this point.

Pi MusicBox is working, Spotify and network files stream successfully through web browser and I get sound from the analogue output of my Pi 2 Model B, but I get ZERO sound from my DAC which uses an X-Mos chipset USB card.

I’ve toggled all the settings under USB audio to no avail, and see no errors running speaker-test, but there is no pink noise to be heard…

The USB card is listed under amixer and aplay -l and is the default playback device, it is unmuted and volume maxed as far as i can tell in alsamixer…

have I missed some settings somewhere?

any help will be greatly appreciated, this is an amazing piece of software that I really want to get working!

Thanks

root@MusicBox:~# amixer
Simple mixer control ‘VIO Internal Clock Validity’,0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'VIO USB 2.0 IF ',0
Capabilities: pvolume pswitch penum
Playback channels: Front Left - Front Right
Limits: Playback 0 - 127
Mono:
Front Left: Playback 127 [100%] [0.00dB] [on]
Front Right: Playback 127 [100%] [0.00dB] [on]
Simple mixer control 'VIO USB 2.0 IF ',1
Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum
Playback channels: Mono
Limits: Playback 0 - 127
Mono: Playback 127 [100%] [0.00dB] [off]
root@MusicBox:~#

root@MusicBox:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
Subdevices: 7/7
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: IF [VIO USB 2.0 IF], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
root@MusicBox:~#

root@MusicBox:~# cat /etc/asound.conf
pcm.!default {
type hw
card 1
}
ctl.!default {
type hw
card 1
}

2

From first look it seems you’ve done everything right and it looks pretty good. But one: there appear to beare two mixer devices on that card, the 2nd of the two does claim to be ‘off’. Can you try toggling that in alsamixer?

3

thanks for the reply - how exactly do I toggle that?

I don’t see many options apart from up/down for volume?

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4

doh… it was pressing M which unmuted it…

I will see what this does and report back

5

alright I now get sound so that’s awesome

problem now is when setsound.sh is run at startup it mutes again - is there a way to stop that happening?

6

It’ll always run so the easiest thing is to comment out / delete the call to it in /opt/musicbox/startup.sh

7

thanks that worked! :heart: