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comment Audio capture from multiple USB sound cards In Lubuntu
This will blow up if the devices aren't synchronized, and might exceed the USB bandwidth limits, but see How to get a NI Traktor Audio 2 sound card work with Mixxx.
May
17
comment Realtek HD Audio Driver failed to build
The problem is that your build system is using -Werror, but the Realtek package does not expect that. Apparently, the Realtek package is outdated. Please note that Realtek also puts their changes into the kernel drivers; if an update to the newest kernel does not help, the Rt-Linux-HDaudio package is unlikely to help either.
May
13
comment Realtek HD Audio Driver failed to build
What do you mean with "Realtek" drivers? Something downloaded from the Realteak website, or drivers from Ubuntu for your sound chip?
May
9
comment ALSA Audio errors - Trusty
Show the output of amixer -c 1 scontents.
May
8
comment ALSA Audio errors - Trusty
Which of those fifteen devices is actually used by the app?
Apr
28
comment ALSA Audio errors - Trusty
Some program or library (probably PortAudio) tries to open lots of possible sound devices, and does not suppress error messages for any that do not exist. This is not an actual problem.
Apr
23
comment Set sound device for individual applications using alsa
See environment variables.
Apr
10
comment Sound system on Ubuntu 14.10 not working
To edit your original post, click "edit".
Apr
10
comment Sound system on Ubuntu 14.10 not working
Why are you mentioning the GPU? What is the output of amixer -c0 scontents?
Apr
9
comment Alsamixer cannot be found
cannot open mixer: implies that the file that is not found is the device file. Apparently, your sound driver is not loaded. Show the contents of /proc/asound/cards, and the lspci output of your sound devices.
Apr
4
comment Alsa unsupported soundcard
Show the output of lsusb -v for this device.
Mar
26
comment plugging in headphones messes up audio
Get the control settings with amixer contents when it works and when it doesn't. What is the difference?
Mar
25
comment plugging in headphones messes up audio
Reinstalling should not be necessary. Can you leave out any of those steps?
Mar
19
comment Asus Xonar DGX recognized but no sound
It just means that lspci could not read some information because it was not run as root. Anyway, did you tell Ubuntu that you want to use the DGX, and not the GPU's HDMI output?
Mar
18
comment aplay -l won't see my loopback sound card
Show the output of ls -l /dev/snd/.
Mar
9
comment Ubuntu : where to set music volume for better result?
Isn't your goal to improve what you hear?
Mar
8
comment Ubuntu : where to set music volume for better result?
If you do not hear any difference, why do you think there is one?
Mar
2
comment usb audio interface not recognized by alsa
Unload and reload the snd-usb-audio module. Are there any messages in the system log?
Feb
9
comment Xubuntu 14.04 USB sound card problems
alsamixer changes a device's mixer controls; it does not affect what device other programs choose to use. Can't you switch devices in the sound configuration? Did you try pavucontrol?
Feb
5
comment put ALSA as module ERROR
Why do you think you need to install a Realtek driver?