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Questions tagged [alsa]

ALSA (Advanced Linux Sound Architecture ) is an API of audio functions for the linux platform.

Please provide additional information by running alsa-info.sh see ALSA Wiki: Help To Debug

782 questions
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Why do I have to run alsactl init each time I boot my system?

After a new update, there is no sound by default in my Debian Squeeze box until running alsactl init, but whenever rebooting the computer I have to run the command again to gain sound. How can I solve this problem?
WIZARDELF
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6
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2 answers

Trying to hear audio coming from LINE IN using ALSA on Debian

I have a netbook with Debian sid, command line only, using it for a server. I am trying to configure it so that the speakers play back what is going in through the netbook's line in audio port. I can not find a simple way to do that. As far as I…
user55255
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4
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1 answer

How do I debug Alsa configuration file errors?

I've got an embedded device with ALSA support, and I'm trying to figure out how to get dsnoop working. The reason is that I want two applications to share the microphone input. But the problem is that ALSA seems to ignore /etc/asound.conf entirely.…
MSalters
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Trying to improve sound quality with ALSA

I'm trying to make ALSA 1.0.23 to use different resampling algorithm. I did some research on the Internet and found that putting the line defaults.pcm.rate_converter "" into either /etc/asound.conf or ~/.asoundrc will tell ALSA to use…
user310
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3
votes
1 answer

Detecting when only silence is being played

My PC is connected to an audio amplifier that I can switch on or off over the network. I would like to set things up to switch it off automatically after no audio has been playing for 10 minutes. I found some similar questions here which advised…
Malvineous
  • 6,883
3
votes
1 answer

Alsa virtual rawmidi port will only receive first and last midi byte of any message

I have been experimenting with the following code: alsarawmidiin.c The alsa rawmidi states that you can create a virtual rawmidi port by naming the input port "virtual" So I compiled the code and started it with the command: alsarawmidiin…
sixeight
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3
votes
1 answer

How to simultaneously play sounds on 4.0 surround system using aplay

After my first configuration war against alsa (won with the help of CL.) check this question ... I would now want to go further : I am able to play multi-channel sounds on my setup, but I now need to play them simultaneously ! I found out that using…
Pier
  • 286
3
votes
2 answers

How to combine dmix with ladspa plugins to default device

A while I have abandoned all sound daemons and lived happily ever since with just the dmix plugin. However, recently I got annoyed by the different volume levels of youtube videos and decided to plug in a compressor and a limiter. IMHO this is an…
Martin Drautzburg
  • 2,498
2
votes
1 answer

Set Volume range in ALSA

I just bought a Asus Xonar U3, but it's way too loud. So I played around a little bit and compared values of the Xonar U3 and my old Soundcard in /var/lib/asound.state and noticed there are some values which are different. Specifically I am looking…
KrawallKurt
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ALSAMIXER - deleted the alsa* from /bin - need to recover

I am an Archlinux user and I ve had problems with alsamixer which didn't play sound in google-chrome. So I 1st tried to uninstall it using: sudo pacman -Rns alsa-plugins alsa-tools alsa-oss After "removing" the alsa (so I ve thought) I could still…
71GA
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1
vote
1 answer

Why aplay cannot play a 4 or 6 channels sound when speaker-test does?

I am currently trying to setup a soundblaster card (CA106 chipset) to output to 4 channels. I plugged 4 speakers to analog output (using the jack plugs). When I am testing the pseakers using the speaker-test utility it works well, but whenever I am…
Pier
  • 286
1
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0 answers

Triggering process on alsa volume change

I'm building a car stereo using a Raspberry Pi, a touch screen and half of an existing car radio. I've remove the front screen from the car radio and hooked the Raspberry Pi in to the correct circuits to mimic a user turning the volume control. That…
CoximusPrime
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Routing and Mixing Capability ALSA

What is meant by Routing and Mixing capability in ALSA? For Reference: Link - https://wiki.st.com/stm32mpu/wiki/ALSA_overview#Purpose
Robin Gupta
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How to use ALSA ttable syntax to swap side and rear channels in 5.1 audio?

I have 5.1 speakers. I have noticed that if I select 5.1 configuration and try to test the sound, when the test reaches to rear left and rear right I don't hear anything. I found that if I choose 7.1 configuration when the test reaches to side left…
Dragno
  • 111
1
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0 answers

Using two independent audio output devices with one source. ALSA

I am trying to use a HiFi Berry DAC at the same time as the onboard-audio of a Raspberry PI 3B. I have already tried to configure alsa with a pcm route and 2 pcm dmix's to get the desired result. And speaker-test proves that my two dmix devices are…
Lukas S.
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