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Output to Multiple Audio Devices with Alsa - Eliot Eshelman
http://www.6by9.net/output-to-multiple-audio-devices-with-alsa/
Once you have your devices figured out and know which output plays where, you instruct ALSA to duplicate the audio output to both of the sound cards. This is the configuration that worked for me (install in ~/.asoundrc or /etc/asound.conf) – the 2-channel settings are for the headphones (SoundBlaster Live) and the 4-channel settings are for ...
Send audio to sound card for playback using ALSA - …
https://www.mathworks.com/help/supportpkg/raspberrypi/ref/alsaaudioplayback.html
Description. The ALSA Audio Playback block sends audio data to the audio output devices, such as speakers or headphones, connected to the hardware. The block uses an Advanced Linux Sound Architecture (ALSA) driver framework to send audio data. The block accepts an N-by-C matrix, where N is the samples per channel, and C is the number of channels supported by the …
Alsa Opensrc Org - Independent ALSA and linux audio ...
https://alsa.opensrc.org/DigitalOut
MythTV can be configured in Utilities/Setup->Setup->General, on the third page, by typing 'ALSA:hw:0,1' into Audio output device; xine can be set on the audio tab in setup by setting any output you like to 'pcm.hw:0,1' and the audio driver to alsa; Phonon can be configured in the KDE system settings, after checking the advanced devices box.
ALSA and KXStudio [Linux-Sound] - Linux Audio
https://wiki.linuxaudio.org/wiki/alsa_and_kxstudio
Such issues may be worked around by inserting an app such as Non mixer or jack_mixer between an audio source and the problematic output device until the issue is fixed within ALSA. Cadence and ALSA Cadence is primarily used to control and monitor the various Linux sound systems, including ALSA, under KXStudio.
[Solved] Alsa Sound and HDMI output / Kernel & Hardware ...
https://bbs.archlinux.org/viewtopic.php?id=227456
I noticed the first output device is a "GF100 High Definition Audio Controller" and the Port shows "HDMI/DisplayPort (plugged in)". I enabled it and I get sound over HDMI and I can control the sound level using "pavucontrol". However, my "Volume Control" can't control the audio volume. I can select HDA Nvidia as a device but I can't select a ...
audio - ALSA: how to temporarily change the output device ...
https://unix.stackexchange.com/questions/88118/alsa-how-to-temporarily-change-the-output-device
I want to do a simplest thing possible in ALSA: to have USB-headphones produce sound instead of internal speaker of my tablet. I don't want to change config files such as asound.rc or alsa.conf or asound.conf and permanently set headphones as default output device by changing the order of devices, I want a temporary effect, just until I unplug the headphones.
Playing with ALSA loopback devices | Playing with Systems
https://sysplay.in/blog/linux/2019/06/playing-with-alsa-loopback-devices/
Interestingly, audio loopback could also be achieved in user space using alsaloop from alsa-utils package. Here is a demo of the same. From the output of aplay -l, hw:1,0 is the analog out (speaker). Note that hw:1,0 is same as hw:1,0,0. Find the equivalent on your system. And, now let’s loopback the virtual audio capture device hw:2,1,4 to this:
Alsa: get audio from specific Input to specific Output ...
https://unix.stackexchange.com/questions/405283/alsa-get-audio-from-specific-input-to-specific-output-stream-for-monitoring
Each of the D/A Audio Outputs is then fed to a mixer (nodes 0x0c, 0x0d and 0x0e). The other input of each of these mixers is a feedback mixer (node 0x0b). The feedback mixer in turn gets signals from the most of the pins, including the inputs, and it has ALSA mixer controls associated with it (XXX Mic Playback Volume, XXX Mic Playback Switch).
Alsa Opensrc Org - Independent ALSA and linux audio ...
https://alsa.opensrc.org/Sound_Cards:_Introduction
For computer output the standard is somewhat different. Output to the computer is allowed from just one of the analogue inputs or from the main stereo output after the tone filter, or from a mono version of the main output. In ALSA the latter are often called the 'MIX' and 'MONO MIX' channels.
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