USB sound card recognised but not being used

Pi MusicBox
1

Hi,

I’m trying to setup a rpi2 to use a USB soundcard.
I have the musicbox settings set to usb but sound defaults to HDMI, and if that is not plugged in the headphone jack.
I’ve tried everything I’ve found online - outputs here:
My usb card ( Asus Xonar U3) is 0 here:

root@MusicBox:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Device [USB Advanced Audio Device], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 8/8
  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
  Subdevice #7: subdevice #7
card 1: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

cat /etc/modprobe.d/alsa-base.conf
# autoloader aliases
install sound-slot-0 /sbin/modprobe snd-card-0
install sound-slot-1 /sbin/modprobe snd-card-1
install sound-slot-2 /sbin/modprobe snd-card-2
install sound-slot-3 /sbin/modprobe snd-card-3
install sound-slot-4 /sbin/modprobe snd-card-4
install sound-slot-5 /sbin/modprobe snd-card-5
install sound-slot-6 /sbin/modprobe snd-card-6
install sound-slot-7 /sbin/modprobe snd-card-7
# Cause optional modules to be loaded above generic modules
install snd /sbin/modprobe --ignore-install snd && { /sbin/modprobe --quiet snd-ioctl32 ; /sbin/modprobe --quiet snd-seq ; : ; }
install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi && { /sbin/modprobe --quiet snd-seq-midi ; : ; }
install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 && { /sbin/modprobe --quiet snd-emu10k1-synth ; : ; }
# Keep snd-pcsp from beeig loaded as first soundcard
options snd-pcsp index=-2o
# Keep snd-usb-audio from beeing loaded as first soundcard
options snd-usb-audio index=0 
options snd-bcm_2835 index=1
# Prevent abnormal drivers from grabbing index 0
options bt87x index=-2
options cx88_alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2

root@MusicBox:/# cat /etc/rc.local 
#!/bin/bash
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#

/opt/musicbox/startup.sh
modprobe snd-usb-audio

exit 0
root@MusicBox:/# lsusb   
Protocol spec without prior Class and Subclass spec at line 17454
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 004: ID 040b:2013 Weltrend Semiconductor 
Bus 001 Device 005: ID 0b05:17a0 ASUSTek Computer, Inc. Xonar U3 sound card
Bus 001 Device 006: ID 0a5c:21e8 Broadcom Corp. BCM20702A0 Bluetooth 4.0

I’m fairly new to pi and linux in general, and have no idea what to do from here?

Any ideas?

Thanks.

2

I’m still struggling with this.
I have now found that if I run:
speaker-test -c2 -D hw:0,0

I can get the whitenoise played through my USB card… so it definitely works! I just can’t get it set as my default option or musicbox playing through it.

I have noticed that in the startup output setting sound configuration…found unknown device is displayed briefly, then it sets my hdmi output…

I’m hoping someone can help me override this?

3

Have you tried the latest version of the setsound script? USB audio bugs were fixed in that. Instructions at https://github.com/woutervanwijk/Pi-MusicBox/issues/216#issuecomment-75832516

1 Like
4

That has fixed it, thanks so much - I spent many many hours with this!