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Questions tagged [alsa]

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

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Split Front/Rear/Aux on Mic/Input ports on one sound card to different capture sources (Pulseaudio/ALSA)

I have an Asus Xonar DG installed in my Pop OS (Ubuntu 19.04 flavor) machine. I was wondering if I am able to separate the different capture sources into discrete inputs for use in Jack and streaming ...
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4 views

Prevent applications from changing alsamixer capture levels

How do I prevent applications from changing alsamixer capture levels? Chromium keeps changing my mic's gain.
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47 views

ALSA mono configuration not working

I installed a new PCI based soundcard in my PC. It has 8 S/PDIF based I/O pairs with each line numbered 1 to 8 for input as well as output. And I'm trying to use input lines 3, 5, 7 for input (mics) ...
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Record sound from USB Tablet microphone with ALSA on Gentoo

I fail at recording sound with a tablets microphone that is connected via USB to my Gentoo Linux. I checked my settings and see tha USB Microphone is detected. arecord --list-devices **** List of ...
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1answer
59 views

Using and configuring ALSA plugins dmix and dsnoop for stereo play and capture

I installed a new PCI based soundcard in my PC. It has 8 S/PDIF based I/O pairs with each line numbered 1 to 8 for input as well as output. And I'm trying to use lines 3-8 for input (mics) and 3-8 for ...
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25 views

Control Pulseaudio LineOut/Headphone volume separately

The default PulseAudio behavior is as follows: First we connect something to the back panel of our MOBO, normally this would be speakers, then we connect something to the front panel, normally ...
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20 views

How to force PulseAudio to recognize my audio device

I have a Lenovo laptop. For about two years my Focusrite Saffire audio interface has worked correctly and shown up in the "Output" options of the Sound Settings. Now, it not randomly started to now ...
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5 views

CentOS7.5 + Alsa + ALC892 master volume change issue

using CentOS7.5 with ALC892. Pulsaudio is uninstalled, only Alsa is used on its own (e.g aplay + amixer). Whenever I change the master volume on sound card, it takes ~30 second while the volume change ...
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34 views

Sound doesn't work after migrating archlinux32 to new hardware

After changing a hardware and booting up same operating system(archlinux32) on it the sound doesn't work at all. On old hardware it worked well. When migrated: Booted up a live ISO Ran mkinitcpio -p ...
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1answer
27 views

How to ask ALSA to output to a specific Pulseaudio sink?

Various examples on the web, as well as the output of aplay -L, indicate that I have an ALSA device named "pulse" which I can use as a shim to let ALSA-compliant applications output to Pulseaudio. ...
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46 views

Trying to make loopback device as Alsa-to-Jack bridge

Using this guide i trying to make loopback device as Alsa-to-Jack bridge. Everything fine until those lines # capture client alsa_in -j cloop -dcloop # playback client alsa_out -j ploop -dploop On ...
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58 views

Asterisks locks ALSA device if chan_alsa is loaded

I am implementing an extension 900 which routes the audio to ALSA device.  I am also using mpd, which plays music through ALSA. Asterisk 15, OpenWrt 18.06 mpd.conf: log_file "syslog" ...
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11 views

Port error on Ardour

I’m running Ubuntu Studio 18.10. In Ardour 5.12,.0-3. connecting to Jack, or ALSA, when I close a project then try to open another one, I get an error message that says “unable to create port: failed ...
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1answer
27 views

Sox format for stream with sample spec 's16le 1ch 16000Hz', channel map 'mono'

I'm trying to pipe audio to sox and I get Error "sox FAIL formats: bad input format for `-': sampling rate was not specified" parec -d alsa_output.pci-0000_00_1b.0.analog-stereo.monitor --rate=...
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43 views

Loop audio file from the command line (gapless) or into new file

The only command line solution for gapless playback I found so far (working with ALSA and JACK) is moc (»music on console«). While I'm still searching for a simpler way I was wondering if it is ...
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91 views

How to enable Pulseaudio for Wine on Fedora 29?

I have struggled to find an answer to this, so I wanted to share what I came up with. In my 32-bit wine prefix on Fedora 29, I have been unable to enable audio. I installed the wine-pulseaudio and ...
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24 views

gst123 - select alsa device for playback with external USB soundcard

I'm truing to get my audio played back by an external USB device, using the GStreamer based command line media player gst123 which comes with the option: -a, --audio-output=<driver>[=<dev>...
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Possible bad install of alsamixer utility

Kernel version: 2.6.35.14 running (embedded) on an ARM MCIMX51. The system is rather outdated and old (ASoC). I am getting odd behavior with sound. I already defaulted asound config file (asound.play) ...
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80 views

Specify alsa device name or aloop for system ouput audio to be used as input in ffmpeg command

I am using Debian 9 with its version of ffmpeg. This is my ffmpeg command I use to screen record: ffmpeg -thread_queue_size 4096 -f alsa -i plughw:CARD=Device,DEV=0 -thread_queue_size 4096 \ -f alsa -...
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59 views

Alsamixer-Equalizer with Kodi, HifiberryAmp+ and Raspi does not work

I am using a Raspberry Pi with Kodi and a HifiBerry Amp+ as a stereo. Everything works great so far, but I am lacking the possibility to use an equalizer to adjust bass and treble. I want to use ...
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31 views

Noise in beginning of alsa application

I have ALSA driver for capture device which works fine with VLC. when I try to capture and render using own application having some issues. Issue is:When I start play, it has some noise in beginning ...
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1answer
34 views

MPD gives no audio from HDMI on PI-zero

I run MPD on a PI-zero. When configured the audio systen to analog (3.5mm jack) it runs ok. But when changed to HDMI and a HDMI splitter no sound comes out. When using “aplay” or “speaker-test” all is ...
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41 views

ALSA behaviour on stereo mic during process suspend

Goal Suspend a Python process listening to pcm.record_right (for Google-Assistant) Continue using pcm.record_left in a different python process (for Snowboy hotword detection) Use Case I want to ...
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236 views

Why alsa can't play sounds (Playback open error: -16,Device or resource busy)?

I built a new system based around the ASUS ROG STRIX B350-F, and transferred my hard drive from the old system without changing anything. At first, I got no sound due pulseaudio selecting the HDMI ...
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1answer
33 views

ALSA Check if spdif plugged in / active

Is there any way in alsa / libasound to check whether the SPDIF In actually has a device connected? I'm currently using a Raspberry Pi with an USB sound card to merge the audio from my PC coming in ...
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46 views

No sound in Debian 9 for most of the start ups of the system (sound card is recognized)

I installed Debian 9 64-bit a couple days ago in a Compaq Presario desktop. Everything was going ok until I found that there was no sound. Initially this was solved with a reboot. Unfortunately in ...
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14 views

Is my Speechmatic USB MultiAdapter recognized by the kernel?

Alsamixer shows my Speechmatic, but it doesn't work in any application. I have .asoundrc set to device 1, and it works with other USB sound cards, like my Logitech, but not this one. I think I have ...
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1answer
70 views

Alsa and alsactl: init, store and default configuration of control file

The target kernel is: 2.6.35.14 (old) and its running on an embedded platform and the codec is a wm8753. I am trying to understand how the alsactl system works. I found a file asound.play @ etc/alsa ...
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62 views

Alsa - dmix, softvol config?

I want to acheive the following: A USB DAC is connected to a linux box. So far no issue... card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: ...
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PopOS - Headphones making Heart Beat sound while plugged in

Since this morning my headphones have been making a "Heart Beat" thumping noise while plugged in. No sound plays through them. Sound plays normally through laptop speakers. I am running Pop!_OS ...
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87 views

ALSA Lib and Fork Support Errors in Personal assistant -Python - Raspbian [closed]

My personal assistant built on python was working fine till few days ago. Now it is producing these errors. I am working on raspberry pi with OS Raspbian. E1123 17:07:41.305739108 3048 fork_posix....
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246 views

How can I get my laptop's internal speakers to work correctly on NixOS?

As far as I can tell, the subwoofers on my Lenovo Yoga C930 aren't being engaged at all on NixOS, which results in a really flat sound. The speakers sound great when I reboot into Windows 10. How can ...
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ALSA - Sound stopped working in Arch for USB sound card after upgrading KDE from 5.7 to 5.14

Yesterday, I upgraded KDE from 5.7 to 5.14 after having display issues because it turns out I had installed the wrong package. I had some trouble initially getting sound to work in 5.7, but I finally ...
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235 views

Sound issues after recent 4.18 kernel on Spectre x360

After upgrading to the 4.18 Linux kernel using Debian sid, I've been dealing with some sound issues that I haven't before the upgrade. After the laptop suspends, majority of the time (but not always) ...
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1answer
366 views

Debian dummy output alsa hooks failed

yesterday my audio working just fine. But, today after I upgrade packages using dist-upgrade pulseaudio detects no cards and just show dummy output in volume control. After some research I thought it'...
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2answers
315 views

Multiple problems with alsamixer after opening up laptop (no problems in other OSs)

This randomly started happening today. Yesterday I opened up my laptop to clean it out. I also disconnected the CMOS battery cable by mistake. When I open alsamixer in a terminal, the following ...
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1answer
900 views

Audacity doesn't work with pulseaudio anymore

UPDATE: Today's upgrade to alsa-lib-1.1.7-2 fixed the issue. (2018-11-23) Arch Linux, up-to-date. As so often, a -Syu upgrade broke things again. This time it's audacity. Usually audacity, and any ...
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98 views

What is the meaning of fragments and fragment_size in PulseAudio ALSA modules?

Following advice on a blog post called Pulseaudio And Latency, I tried loading module-alsa-sink with special fragments and fragment_size parameters to ensure low latency. However, I'm not sure what ...
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1answer
34 views

About ALSA sound

The aplay command can determine the correct card and slot to play the sound. Can I use aplay before configuring /etc/asound.conf or .asoundrc? Or is it necessary to write this configuration before ...
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199 views

My audio stopped working suddenly in Debian/i3wm/alsa/pulseaudio

Once after i rebooted my laptop, my sound just stopped to work since then. I've already search a lot of solutions, the common solutions didn't suit my case. The auto-mute mode is disabled in ...
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1answer
103 views

How to make new ALSA control appear in amixer

On an embedded Linux system I am creating a custom ALSA "soft volume" control as described here. The control itself works as expected, except that upon boot it does not show up in amixer. It only ...
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1answer
316 views

How does PulseAudio determine which ALSA devices to make available or not?

PulseAudio usually does a pretty good job of determining what ALSA devices are available and setting them up automatically. When it doesn't, I'm not clear how this seemingly automatic linkage occurs. ...
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72 views

disable switching sound devices after loading snd-aloop

I may have missed this in ALSA snd-aloop's documentation, but every time I execute modprobe snd-aloop, my sound card output and input automatically switches to the newly created loopback devices. Is ...
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175 views

Virtual audio device won't show up anymore (snd-aloop)

Archlinux on gnome 3.30. Until the most recent update (3.28 -> 3.30) I used snd-aloop constantly to create a virtual sound device. After the update and a system reboot however it doesn't seem to work ...
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1answer
325 views

Crackling sound with ALSA from an USB sound card after resuming from suspend

I run Arch Linux using Systemd and ALSA on a Thinkpad X200 and I have an USB sound card connected, which I use for audio output. The audio is fine until I suspend my machine with $ systemctl suspend. ...
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608 views

Pulseaudio setting up sinks and sources for A2DP and HFP connections

I'm trying to set up A2DP+HFP profiles in an embedded board. Goal is to use pulseaudio 12.2, ofono 1.18, and bluez 5.41 in order to connect to a mobile phone and use A2DP, HFP profiles automatically, ...
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43 views

What am I missing in my kernel patch for ALSA to get EAPD to properly turn off this internal speaker? [closed]

I'm working with a picture-frame-like device manufactured by the late OpenPeak Inc. known as the OpenFrame (or O2 Joggler in the UK). It has an internal speaker and a 3.5mm line out socket; none of ...
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0answers
25 views

debian 9, gnome 3.2 audio device selector not working sometimes [closed]

Usually when i plug-in a headphone jack a window pops up asking if it's a headphone, headset or microphone. But sometimes after waking from sleep, or rebooting with the jack plugged in this stops ...
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107 views

ALSA: Zoom H4n Not Working as USB Audio Source on PC

Once upon a time, I was abe to plug in my Zoom H4n field recorder into my main PC and have it appear as another audio source inside Audacity for live recording. Worked great. Sometime in the last ...
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487 views

How exactly USB Audio will be detected in Linux? [closed]

How will the Linux detect that I connected a USB Audio Peripheral? If I connect a USB Charger it will charge my mobile and it does not show any Headset icon on my status bar(Android). But when I ...