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

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Does alsa depend on the kernel version?

Lately I had nothing but trouble with my sound setup. The full chain looks like this: alsa (pulse plugin)-> pulseaudio (jack plugin) -> jackd -> firewire soundcard This works fine, except ...
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147 views

Choppy sound with flashpayer

After a number of updates, including upgrading to flashplayer 11 and kernel 3.8.2 sound from flashplayer and skype has become choppy. Setup In my setup I have .ascoundrc set up to use pulseaudio ...
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2answers
452 views

Unexpectedly lost speaker output. Headphone output works fine

Yesterday when I opened my laptop I noticed that I no longer had sound from the built-in speakers. I carefully checked settings in Sound Preferences, and then dropped to shell and looked in ...
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0answers
151 views

Setting up surround sound with optical out

I have centos 6.3 running on this pc. the built in sound card is detected normally and is a 7.1 card with all speakers listed. It includes a optical out as well as hdmi for the built in video. It ...
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1answer
505 views

Internal microphone doesn't work on Dell Vostro 3360

I've got Dell Vostro 3360 laptop, and internal mic doesn't work. I use 3.8 series kernel. When I try to record sound from mic I get only weird noise. All sliders in alsamixer are 100% and capture is ...
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2answers
403 views

Why does Arch Linux keep Windows headphone mute

I have Windows 7 installed, and headphones work perfectly. Few days ago, I installed Arch Linux along with Win7. This issue appears with gnome/xfce4/openbox. Perhaps it is not related to desktop ...
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0answers
208 views

How to configure buildroot to add a sound device?

I've used a given board configuration to reconfigure it for my individual board. My board has a CS4270 sound device of Cirrus Logic. My uImage is booting successfully on my target hardware, but an ...
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1answer
44 views

Linux via Buildroot doesn't include alsa-utils

After following these instructions from here and from here, my booted Linux does not include ALSA-Utils like "aplay". But I have set all ALSA options. Any idea what's wrong? I also found this but I ...
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3answers
6k views

Change PulseAudio Input/Output from Shell?

I have a set of nice wireless headphones which I use from time to time, in addition to my speakers and normal microphone. I'd like to write a script to switch between one input and output source and ...
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1answer
3k views

Sound not working when both the sound card and HDMI use the Intel HDA driver. How to exchange their device loading order?

I have an Acer Aspire One 522 netbook which has an Intel HDA sound card based on the Conexant CX20584 chipset. Although KDE does output sound when starting up, flash and probably many other apps which ...
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1answer
739 views

Configuring default alsa device (hw:0,0) in asoundrc

I am using a multimedia application (XBMC Frodo RC3) that does not allow me to select custom pcm device. It just asks the hardware device (in this case it is hw:0,0). Given this limitation I have to ...
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1answer
340 views

Does SDL require any sound server like PulseAudio to play audio?

I'm trying to make an MP3 player on top of the Linux kernel and busybox using the SDL and SMPEG libraries. Does SDL work on top of the kernel or it needs PulseAudio? I have just built a C program ...
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1answer
2k views

ALSA/ASoC: How to correctly load devices/drivers?

I am using Buildroot to build an embedded Linux (2.6.39.2) system for the NXP LPC3250 microcontroller. Right now, I'm trying to get ALSA/ASoC up and running, but I'm having some issues with getting ...
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2answers
613 views

What is the alsamixer of Pulse Audio?

I just installed Pulse Audio over my ALSA installation. Is there a Pulse Audio equivalent of alsamixer that I can use for tasks such as changing the microphone gain?
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1answer
230 views

Pulseaudio rapidly switches ouputs at high volumes

I'm using Pulseaudio. The image is of the Output Devices tab and shows the Port set to Analog Output. This is fine and works great. There's another option called Headphones but if you try and set the ...
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1answer
1k views

How do I fix a noisy input device (Internal Mic)? snd_hda_intel - debug included

As the title says, I'm having trouble with a very noisy audio input device - the internal mic or any plugged in mics. So far I've narrowed it down to an problem in ALSA since my debug info is showing ...
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1answer
133 views

Turn on PC speaker after resume

After resuming from suspend my PC speaker becomes silent. I need to run alsamixer and arbitrarily adjust its volume either up or down for it to come back again. But if I suspend and then resume a ...
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675 views

Is there an easy way to switch playback soundcards?

I recently purchased the roccat kulo headset which comes with a nice USB soundcard, completely functional under linux :). Howsoever I now struggle to easily siwtch between my laptops integrated ...
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1answer
292 views

How to force ALSA output as single-channel?

My speakers are broken and play at different loudness from time to time. This means that the off-center parts of music sound wrong. How can I force all sound to be centered, so that the two speakers ...
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1answer
226 views

No sound with the newest kernel version - is this a kernel bug or something else?

I have an external USB sound card on a Fedora 17 system (64 bit). It stopped playing sound after I updated the kernel to 3.5.4-1 (the problem persists under 3.5.4-2). As the sound card still plays ...
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4answers
4k views

My audio device not working

I have been setting up a new CrunchBang Linux and my sound doesn't work. When I type lspci -v command and alplay -l command in command prompt I can see that my sound card is connected and detected. ...
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1answer
608 views

Sound not working in Debian except in google chrome and test utilities

Yesterday, I had Archlinux on my Dell Latitude E6520 and the sound was working perfectly fine (I even had the loud beep I couldn't get rid of). Today, I installed Debian and alsa. The first surprise ...
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4answers
2k views

Low sound volume on Lenovo laptop under Fedora

I'm having trouble hearing anything at all under Fedora 16 on this Lenovo T520. Everything in alsamixer is at 100% (both pulseaudio and card). I installed Windows 7 on the laptop to check if the same ...
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4answers
880 views

Pipe system sound to another computer

I have no speakers in my PC (Cent-OS 5.5) but there is a stereo speaker connected to the computer next to my computer (also Cent-OS 5.5). Both computers are networked. Is there any way to pipe my ...
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1answer
1k views

Gnome-sound-applet not detecting sound card

Everything was working until today, the gnome-sound-applet does not detect any sound card. Alsamixer however is working and I can change volume. I noticed that pulseaudio is not running and that ...
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1answer
628 views

Finding the current speaker volume (signal strength)

I'm trying to create a widget for awesome wm that controls and monitors volume. Getting and setting the speaker volume is easy in ALSA and PulseAudio, but how about getting the actual signal ...
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1answer
2k views

Command line audio - piping for simultaneous playback and recording

I am trying to generate sound data, convert it and store it to a WAV format. I'm almost there - except I'd like to hear the generated sound "while" it is being "recorded". This command line just ...
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1answer
2k views

How to change mixing of channels by pulse audio / alsa

I have a recent problem with my sound configuration. Basically, it's way too loud until I set the volume below 10%. And then it's very quickly too silent. Using the alsa mixer, I can set the headphone ...
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1answer
574 views

ALSA dummy device - how to configure?

I am working on an audio stream between two virtual servers. For that, I have set up a dummy soundcard (as the vservers don't have a hw card) using modprobe snd-dummy. That seems to work fine - I am ...
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1answer
1k views

How to have CoreAudio from Mac to Linux/Unix?

After using Alsa and PulseAudio for a while, I feel they are not yet strong enough for Audio capture and audio playback. When I test with loud-speaker and microphone, there is self feedback-loop. ...
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1answer
1k views

No sound in USB headphones using fedora 16

The volume control buttons on the usb headphone work, they can increment or decrement the system sound. However the headphone have no sound. How to make it work? kernel 3.2, pusleaudio is used by ...
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1answer
404 views

Getting more details in ALSA volume

I've bought some new speakers, and they play much louder than my old ones. It's so much that I most of the time keep them at 1% to 3% in alsamixer, which is -103dB to -84dB. This obviously leaves ...
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1answer
5k views

How to check why sound over HDMI doesn't work

I installed Gentoo clean on my system, except my /home but I deleted all hidden folders that might have an impact on sound (.mplayer .pulse* .config .esd_auth and more) and with a fresh user adduser ...
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2answers
1k views

Recording audio output

I've been following these instructions for recording the output of a program I wrote (that uses rtaudio to synthesize music) ...
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2answers
566 views

What Linux distro is good for music and well supported?

I'm pretty disappointed with Ubuntu. It's never been easy to sort out the mess that is Alsa / Jack / whatever and have it work with Pd, Supercollider, Ardour, Lillypad. I've upgraded to the latest ...
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4answers
1k views

Is there any gnome-shell mixer icon relying on alsa and not pulseaudio?

So, long story short, when I installed Mint 12 on my Dell laptop I realized my HDA-intel sound board have problems with pulseaudio. I uninstalled pulseaudio and got my sound back, but removing ...
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818 views

How to make front audio jack work again after waking up from suspend?

Sometimes, after I wake up from suspend (using pm-suspend), the front audio jack stops working (no sound) after I wake up my laptop. Only after a full reboot I get it to work again. My laptop is an ...
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2answers
1k views

How do I know if my microphone is mute or unmute when I have more than one microphone?

How do I find out if my microphone is muted or unmuted, when I have more than one microphone such as Motherboard, USB and HDMI? 1) I can't find it with this: $ cat /proc/asound/cards 0 [PCH ...
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591 views

Why is this ALSA configuration file preventing aplay and arecord from listing PCM devices?

In my embedded system I have this configuration file in /etc/asound.conf: pcm_slave.sl2 { pcm "hw:0,0" rate 48000 channels 2 format S16_LE } pcm.rate_convert { ...
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1answer
931 views

Samson Meteor Mic under Linux/ALSA

Has anybody gotten a Samson Meteor Mic working under Linux/ALSA? I tried to google it but I found no mention of Samson Meteor under Linux at all. Kernel/ALSA/Audacity see the device. Unfortunately I ...
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3answers
5k views

amixer - How to change recording channel?

So fat, I am setting up microphone settings : $ amixer set 'Rear Mic' 90% mute cap $ amixer set 'Rear Mic Boost' 80% But, after some sys. update, my default recoding chanell changed to 'Front Mic' ...
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1answer
18k views

How to use command line to change volume?

I am trying to control the volume using my programming script. How can I do the following in Fedora 15, Ubuntu linux? Mute/ Unmute Volume up and volume down Note: Please note that I use a web USB ...
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4answers
3k views

How can I switch to my USB headset automagically when it's plugged in?

I'm running Funtoo Linux, a Gentoo derivative. My two new Plantronics USB headsets (one wired, one wireless) work nicely. I plug one in, ALSA notices it, and if I manually set an application to use ...
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1answer
209 views

Xorg key clicks?

I've currently got Fedora 9 on my home PC (yes, I know its quite old - but hell I only reboot it every 6 months - nevermind upgrading!) . My only niggle is that keyboard I've got has quite a different ...
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1answer
333 views

Renaming alsa controls

Is it possible to rename alsa controls? My front panel is controlled using "Speaker" and my the back plugs are "PCM". Since this isn't very descriptive I would like to rename them to something more ...
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1answer
670 views

How to get Debian's volume control working with Pulse

I finally configured Pulse to work with every application, however using the volume control on my keyboard still controls the default ALSA selected device. How do I change it so it adjusts the current ...
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1answer
1k views

Saving alsa settings

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 ...
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1answer
1k views

Changing default audio device in Pulseaudio

I would like to use HDMI on my graphic card for audio output. ALSA shows it as a card with 4 devices and I can get sound through one of them (the other three are different channels, perhaps? I have ...
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4answers
10k views

Generating random noise for fun in /dev/snd/

Recently I have been exploring the enchanted /dev folder. I want to write some random data to an audio device in order to generate some noise. I am using ALSA. So I instruct cat to pipe some random ...
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376 views

alsa and 5.1 surround through three front stereo jacks on the Dell Studio XPS 13

I know this is not a tech support forum, but I am not etting an answer from alsa people and have tried much, if not everything. I can upload the alsa-info output if needed, but here is the info ...