Questions tagged [alsa]

Advanced Linux Sound Architecture (ALSA) provides audio and MIDI functionality to the Linux operating system.

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15 views

IceS segmentation fault on encoder start

I'm trying to set up IceS to stream an ALSA input to Icecast. Icecast works well and confirms when I stream using other things to it. However IceS hits a segmentation fault immediately after starting ...
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Headphone volume is controlled by <Speaker> in alsamixer

I plug-in my headphones and there is no sound. I checked alsamixer and it shows this. As you can see headphones volume is maxed, but there is no sound. Just for a joke I increased volume for speakers ...
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22 views

Audio recording from two audio input and playing in 2 audio output simultaneously and real time

I have one Linux Machine with 2 USB speakers and a mic system. I want to record simultaneously from one mic and play in another speaker. Like, MicA recording will be played in SpeakerB and MicB ...
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22 views

ALSA setting microphone levels

I have an USB handset that I am trying to record from and depending on settings I want to mute the device. The only controls that amixer provides is: amixer -D hw:1 Simple mixer control 'PCM',0 ...
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25 views

How to play audio from 2 sources on Raspberry Pi 4

I have Raspberry Pi 4. And I want to play audio from Shairport-Sync and my python script. I use PyGame to play audio file. BUT when, I try to run it, when shairport-sync is playing anything, I have ...
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31 views

ALSA/Pulse connect to microphone alias for remapping channels

I'm using Manjaro Linux, and I have a mono USB microphone that ALSA treats as stereo (It identifies it as a Q1U dynamic microphone, but it is a different mic that clearly uses the same DAC), with the ...
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20 views

Phantom jack detected in front panel

On my PC, dual boot (Windows, Linux) I have an annoying problem: from time to time (like every 15 seconds) my system(both windows, and Manjaro) detect the insertion of jack in the front panel. It also ...
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261 views

“Non-monotonous DTS in output stream” when capturing video with ffmpeg

I'm trying to capture VHS video on Linux using a new USB capture device and FFMPEG.  I'm able to successfully capture either only audio (using Alsa), or only video (using v4l2) but when I try to do ...
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97 views

Raspberry Pi 3 Model B DarkIce ALSA Compatibility

I have a project I'm developing on a Raspberry Pi 3 Model B. The objective is to create a live audio stream from the raspberry to an external Icecast2 server. I got the Icecast2 server running ...
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1answer
70 views

ALSA not playing sound over speaker

I have an application that sends voice packets of PCM data from one node to another. The program also plays a wav file at the startup. The wav file is heard but none of my audio. I added the following ...
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128 views

Issue with Bang & Olufsen speakers on Kubuntu 19.10

First of all, I am aware that this problem is very widespread and still hasn't been fixed, despite it being years old. I am also aware that this question is a duplicate of tens of other questions like ...
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Streaming cam using CVLC - Terrible Audio Quality

I want to record and publish a video stream from my webcam to an RTSP endpoint. This is working for the most part except the audio quality is terrible. While it does record ambient sound there is a ...
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108 views

Configure ALSA to change audio volume similary to the Windows

I have USB audio speaker that is being connected to the Windows 10 and Linux (CentOS). I observed that audio volume control behave differently on Windows and on the Linux - for example; if I set audio ...
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72 views

How can i record only specific tracks of my interface with sox rec

i used this to try to record 2 channels from my behringer x32 via usb. AUDIODEV="hw:XUSB,0" rec -q --buffer 262144 -c 2 -C 256 $FILENAME silence 1 0.1 2% 1 3:00 2% gain -9 I get the following error: ...
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272 views

Alsa snd-aloop module configuration for playback and Capture device

I am trying to create a virtual sound card that can capture audio on the desktop. For this, I am using the snd-aloop module. After the snd-aloop module has loaded the output of aplay -L is shown below:...
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449 views

No Audio output in Linux Mint 19.2 Xfce 64x(Intel HDMI/DP LPE Audio soundcard)

I am using a fresh install on my laptop. After setup, there was no audio output and the pavucontrol app was giving me the message: Establishing connection to PulseAudio. PLease wait After hours ...
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33 views

How to mute only back panel audio?

I have a desktop PC where the front and the back panel are available. Usually the front is for headphone while the back for speakers. This PC's headphone detection is not working so I need to create a ...
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188 views

ALSA USB Audio Softvol asound.conf configuration: always get 'Unknown PCM “softvol”'

I am trying to add a 'pre-amp' type of control to my USB Audio to compensate for the relative low loudness, but whatever I try, I keep getting error messages stating it is unknown. I started with: ...
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99 views

no recording happens using bluez-alsa and sco profile

I am trying to record from Bluetooth headset. I have included bluez-alsa package along with my other yocto packages and compiled. when I try to arecord, the recording is not happening and a sound or ...
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51 views

No sound in Arch Linux with KDE

I recently bought a laptop and installed ArchLinux on it. Sometimes it starts with sound but not all times. Sometimes I have just a Dummy Output in devices, sometimes nothing and even if the real ...
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22 views

ALC3266 w/ Intel CM238 on Alienware 13R3 - Debian 10 Kernel 5.2.11 - ALSA - No Input on Both Combo and HeadPhone Jack

I have a problem with ALSA Audio. It does not record input from Combo Jack or Mic Jack. From Combo Jack output sound is fine. Title is giving the info on hardware. Additionally, my Mic Jack can be ...
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264 views

No sound - Dummy output - Ubuntu

You see, my problem is this... I have a soundcard integrated on my mother board. I am using an Ubuntu machine For a while I cannot use my sound card. I tried anything from question and forcing alsa ...
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69 views

PulseAudio buzzes and delays

When I try to play sound on my computer, there is a significant buzzing, seeming focused around the lower frequencies of the sound. Also, sometimes the higher frequencies (and only higher frequencies) ...
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26 views

Sound doesn't come back after hibernation

I tried to debug it myself and had some success, but still need some advice in order to solve the problem properly. The Problem: After I put my computer to hibernation I have no sound (suspend works ...
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1k views

ALSA Error: ALSA lib pcm_hw.c:1713:(_snd_pcm_hw_open) Invalid value for card

Hey there dear community, I have been struggling with getting a Raspberry 3b+ and microphone setup to run for a few days now, interestingly getting the same error on both projects simultaneously even ...
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87 views

Alsa external io plugin not working with pulse aludio

I am developing ALSA plug-in based on ALSA PCM External Plugin SDK. Plug-in is source plug and has to convert PDM signal from microphone input to PCM used by Linux. I have succeeded to compile it ...
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1answer
249 views

Difference between alsamixer and amixer's output about the percentage of Master

I'm trying to write a bash script to find the percentage of the sound volume. I used this: amixer get Master | awk '/Mono.+/ {print $6=="[off]"?$6:$4}' This command prints the volume percentage of ...
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14 views

USB Mircophone only works when youtube is playing a video. Raspberry Pi 3b, Raspbian

I'm using a Raspberry Pi 3b to do home automation. I'm using snowboy for hotword detection. Recently I unplugged my microphone while my snowboy python demo program was running. Since then I haven't ...
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1answer
494 views

How to get alsa dummy soundcard on debian in Docker

I am trying to configure a dummy sound card in a Debian docker container. Unfortunately the documentation I find on the internet is incomplete and old. I was mainly looking at this post on reddit and ...
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1answer
313 views

No master in alsamixer

I have problem with sound in Arch Linux; alsamixer worked well for one month. Then after a reboot, I can't find Master and other controls. Here is a screenshot: I installed Xubuntu and the sound ...
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49 views

Pulseaudio device name changes

I would like to set my default sink/source in pulseaudio but the name constanly changes. It's either alsa_input.pci-0000_00_1f.3.stereo-fallback or alsa_input.pci-0000_00_1f.3.analog-stereo and ...
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52 views

Synchronize multiple realtime inputs

I'm trying to record a video+audio using ffmpeg from 3 sources: x11grab (desktop), v4l2 (webcam) and alsa (microphone). I'm using this script: #!/bin/bash set -x out=$1 rm -vf $out rate=25 cam_size=...
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1answer
956 views

Ubuntu 19: No sound at the Headphone Jack - Audio

I've a problem with the sound at the Headphone jack on my Optiplex 9020m after installing Ubuntu 19.04 on it. Here is what alsa says. My soundcard is not in the list, and lspci | grep -i audio ...
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808 views

Sound card driver not detected on Linux Mint 19.1

This question may be a duplicate, but I have tried the suggestions given elsewhere to address this problem and nothing has helped. Here is my system info: System: Host: justin-Z97M-D3H Kernel: 4....
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115 views

no sound when I restart ubuntu cosmic (system76 box)

I'm having this problem that I lose sound when I restart my computer (It's a system76 box with system76's kernel and goodies). I checked this page https://support.system76.com/articles/audio/ and the ...
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1answer
167 views

How to make speaker render silence output for 2 sec in ALSA (Advanced Linux Sound Architecture)

I want make the audio speaker on a computer silence for 2 sec by writing 0's data to "default" device using ALSA (Advanced Linux Sound Architecture). Below is code snippet. int val int size = 24000; ...
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249 views

sound – Turn off sound except beep (ALSA, Pulseaudio)

I use short beep tone in X.org. I want to keep sound muted (or at minimum volume) except the beep. I use ALSA. I need beep from xterm or applications that beep using X.org (xscreensaver). How can I ...
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1answer
284 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
97 views

Alsa cannot find capture card

I have a headless machine running Ubuntu server 16.04. I am trying to record audio and video from a Hauppauge ImpactVCB-e PCI Express video capture card. Currently I can record video, but not audio. ...
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679 views

How to inform vlc for sample rate change from device in linux

I'm working in FPGA device, which can provide raw video and pcm data. I'm using v4l2 and alsa framework for video and audio respectively. Audio flow path is using ALSA framework and video flow path is ...
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696 views

Sound card works with ALSA, but not showing in volume mixer

After a system upgrade I noticed I had no sound. In the volume mixer I see that my integrated sound card is not shown, while another one (HDMI) is. I managed to find that the device name is CARD=MID ...
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274 views

USB Microphone over USB switch doesn't work with TeamSpeak

I run an USB Microphone over a USB switch (together with Mouse and Keyboard) on multiple Computers. When i switch back from my other Computer, my Microphone is re-activated by Linux, but TeamSpeak ...
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3k views

Linux no sound on headphone jack

I am unable to get sound out of the headphone jack on my laptop while the speakers work properly, I`m running this; HP Spectre X360 (13-w010nd x360) Linux Lite 4.0 (based on Ubuntu 18 LTS) Im not ...
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1answer
168 views

Linux: Soundcard not being released by some application

so I have a computer running Linux Mint and to play loss-less audio-files I use DeaDBeeF, which I have configured to not use ALSA up-sampling in order to listen to allow my external Audio Interface(...
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146 views

ALSA won't detect card when it exists

I am a bit stuck with fixing my audio in Kubuntu 18 (same was with Kubuntu 16). The only sound device I have in tray is "Dummy output" kosyakov@kosyakov-XPS13:~$ sudo lspci -v | grep -A 10 -i audio ...
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2k views

Where did snd-aloop go?

I'm on arch linux and I've been using snd-aloop to create a virtual audio devices without issues for a year now. Since yesterday's system upgrade to the new Linux kernel (4.18.3) however, the module ...
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2answers
2k views

Linux Ubuntu ALSA issues; after reboot sound is turned off

I'm using Ubuntu with Xfce, ALSA, pavucontrol, … After I reboot the system my sound always goes off. And my speakers in alsamixer are listed as Headphones (which I have to always increase the ...
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1answer
1k views

Multiple audio sources to single ALSA device on different bit rates

I am building a audio streamer based on linux for high quality audio. I have several applications that i want to be able to have acces to the audio device at the same time. (like shairport-sync, roon ...
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1answer
127 views

Is it possible to get audio file currently playing position using Aplay?

Is it possible to somehow make Aplay tell us what is current audio time position while playing?
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41 views

Sharing LADSPA filter output with different processes

On a Linux + ALSA microcomputer platform I'm trying to filter my microphone input for all my applications through a LADSPA filter. The filter takes a certain amount of CPU processing. Below is an ...

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