Questions tagged [alsa]

For questions pertaining to ALSA, the Linux sound subsystem. ALSA sits below advanced systems like PulseAudio.

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What modifies my .asoundrc file every boot?

My .asoundrc file gets modified every boot. If I delete it, a new appears at reboot: pcm.!default { type hw card 0 } ctl.!default { type hw card 0 } If I make changes ...
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  • 141
3 votes
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261 views

Microphone is not recording with HifiBerry and Raspberry Pi 3

I installed the HifiBerry driver as specified. The Board is recognized and the audio output works fine. Just the audio input seems to be not working. I checked if the microphone is muted but I can't ...
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Raspberry Pi Zero W Alexa Microphone Not detecting, but speaker works

So I have looked online and I even got different mics and adapters to get this working, but it still doesn't work. I was able to successfully setup my Alexa Pi on the RPi Zero W, because when I boot ...
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3 votes
1 answer
6k views

Alsa lib error pyaudio on raspberry pi 3

I'm getting these ALSA lib errors when trying to use pyaudio. I know my mic works as I can live stream audio through gstreamer. Can anybody explain to me why i'm getting these issues: ALSA lib ...
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Raspberry Pi / PS Eye - Cannot Load Mixer Controls: Invalid Argument

I want to record with a PS Eye (USB Camera-B4.09.24.1) for an DIY Amazon Echo with Raspberry Pi 2b. When I attempt this in alsamixer, it exits with the following error when I use F6 to change to the ...
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LED strip PWM on GPIO18 + mono audio output

On the RPi 3 I would like to control a WS2811 LED strip with PWM (GPIO18) by keeping the audio working. It looks like for the RPi Zero (I'm unsure for RPI 3 though) left and right channels of the ...
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  • 131
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Arecord not working with USB Microphone anymore

Before I start, I'd like to tell you that I've used arecord in the past with the Raspberry Pi 2 using the same USB Microphone and it has worked just fine. For some reason, it doesn't seem to work ...
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3 votes
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3k views

Jack server not working on Raspbian

I wrote a little python app (using PyDub), that plays sound files. Everytime I run it, I get the these errors: ALSA lib pulse.c:243(pulse_connect) PulseAudio: Unable to connect: Connection refused ...
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  • 31
2 votes
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141 views

High-speed USB Audio Streaming

I am using a Raspberry Pi 3B+ as the USB host for an embedded device that I have configured to appear as a USB Audio 2.0 compliant microphone. I am currently using PyAudio for opening and recording ...
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2 votes
0 answers
619 views

ALSA errors on raspberry pi 4

So i'm trying to make a virtual assistant on a raspberry pi 4. I have coded the bot to work on my windows machine but now I'm running into errors while using the raspberry pi I figured out which part ...
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160 views

Real Time audio recording from two audio input and playing simultaneously in 2 audio output

I have one Raspberry Pi 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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2 votes
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884 views

no audio with playbin or autoaudiosink on gstreamer, but plays with alsasink

recently upgraded my raspian, and installation of RPi with Hifiberry AMP. and my python application that utilizes gstreamer's api is no longer working. as a test to figure out why I am using the gst-...
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  • 121
2 votes
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246 views

How do I capture and stream HDMI audio out to LAN

I have a RPi that is running videos with omxplayer and outputting to my tv. HDMI video and audio out work just fine, but I would additionally like to stream only the audio to my network (via RTP or ...
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  • 41
2 votes
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390 views

USB audio device is displayed as default, but is not

I have set the USB device on my Raspberry Pi to default. The file /lib/modprobe.d/aliases.conf: options snd-pcsp index=-2 options snd-usb-audio index=0 options cx88_alsa index=-2 options snd-atiixp-...
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  • 121
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129 views

Is perfectly uninterrupted alsa sound over USB possible?

I am playing a sine wave from a Rpi3 via pure userspace ALSA to the hw device of a USB sound card (using the official PCM example, no sound servers installed). But the wave never stays perfect, after ...
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2 votes
1 answer
649 views

USB Soundcard shows mic as Playback device in alsamixer

I have some trouble with my USB sound card 68878 from goobay. Alsamixer showing unexpected devices Secondly when I use alsamixer displaying Playback items. I see both a Speaker and a Mic: For ...
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Streaming audio on the Raspberry Pi Zero W with ffmpeg

I have a problem with ffmpeg giving no audio when recording using alsa. Does anyone know how to get a Raspberry Pi Zero W to record and stream audio with ffmpeg using alsa? I have a project where I ...
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2 votes
0 answers
351 views

How to record usb audio and monitor at the same time

I have a usb audio device plugged into my Raspberry Pi 3 with Raspbian Stretch. Recording to an mp3 with sox works fine with this line: AUDIODEV=dsnooped rec -c 1 -q /media/usbstick/recording/...
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2 votes
0 answers
639 views

Pulseaudio unkown PCM pulse

Using IceS for Icecast when I try to record from "pulse" device I get this error when I start IceS: ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM pulse And the program quits. Here is my ....
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  • 143
2 votes
0 answers
647 views

Cannot open hw:0,0 default audio device

Hello I am trying to setup icecast streaming server. Previously I used Loopback devices and it worked fine. But Loopback devices does not have a mixer so I cant play two things at once is you see ...
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  • 143
2 votes
0 answers
1k views

No sound when PulseAudio is running

I have a Raspberry Pi 2 running the latest Raspbian jessie. I have sound working just fine via ALSA and analog out. Recently I installed pulseaudio and have found if pulseaudio is running I no longer ...
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  • 121
2 votes
0 answers
5k views

No display with "dtparam=audio=on"

This is my /boot/config.txt: http://termbin.com/0pq4 (1600x900 screen with HDMI to VGA adapter, turned vertical): # For more options and information see # http://rpf.io/configtxtreadme # Some ...
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  • 21
2 votes
0 answers
728 views

Audio hangs on repeated playback

How do I fix hanging audio in Raspbian GNU/Linux 8.0 (jessie)? When I playback audio using, for example, aplay, the first playback works fine. Subsequent playback will hang indefinitely. Several ...
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  • 121
2 votes
0 answers
1k views

Loopback to aux out and record audio at the same time from audio in

I am currently developing a device that silences adverts from a streaming radio. Im taking audio input from a radio to a USB sound card.To silence the ads, I have am currently using the arecord ...
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  • 93
2 votes
0 answers
671 views

How to Set Up Driver Support for I2S Audio Codec

I am building a I2S audio codec using an ADAU1781 chip, which will communicate with the Pi via the GPIO pins. In my research I have found that there is an ASoC driver built into the Raspberry Pi ...
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  • 169
2 votes
0 answers
2k views

Pulseaudio to ALSA output gets stuck

I've been working on that for a couple of month now, but still don't have a very good solution. My general problem is that my PulseAudio over ALSA audio output is blocked or stuck, I can unblock it ...
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  • 121
2 votes
0 answers
4k views

ALSA channels count error while using simpleaudio with USB DAC

Here is the code: wave_obj = sa.WaveObject.from_wave_file("sounds/2c.wav") wave_obj.play() And this is the error I get: ALSA lib pcm.c:7924:(snd_pcm_set_params) Channels count (1) not available for ...
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  • 281
2 votes
0 answers
781 views

Bluetooth audio without pulse?

Is there any way I can connect to my Bluetooth headphones and listen to audio without using pulseaudio? I also can't use a GUI because reasons. Also, I'm on Raspbian Jessie minimal.
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  • 21
2 votes
0 answers
2k views

alsa cannot read control invalid argument

I am trying to record audio with the PS Eye on a raspberry pi model b plus (I have tried with older b models and the same issue occurs as below). I am able to record, and playback the recording with ...
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  • 121
1 vote
0 answers
194 views

Raspberry Pi 3 B+ with Raspberry Pi OS (32 bit) screen fades out while booting

I've installed the official 7" touch screen on my Raspberry Pi 3 B+. I used the Raspberry Pi Imager to put Raspberry Pi OS (32 bit) on a SD card and while booting, the screen fades out to a black ...
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1 vote
0 answers
405 views

Sound playback trough bluealsa-aplay not working as a service

I am trying to manually setup my raspberry pi 4 as a Bluetooth audio receiver, but there is no sound playback when I start the bluealsa-aplay service I created. It only works when I run the bluealsa-...
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1 vote
0 answers
60 views

Dupe output to multiple cards

I am following the https://alsa.opensrc.org/Asoundrc Dupe output to multiple cards example on 2 stereo usb sound cards. I changed things slightly but basically its the same as the above and 1 card ...
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1 vote
0 answers
53 views

How to play through bluetooth speakers with RPi renderer on lan and openhome/linn android phone control point

Using RPi3b and clean installation of RaspberryPi OS Lite and connecting to network using lan. Media is stored on NAS and served to lan by minimserver. I have installed upmpdcli and mpd on RPi and ...
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  • 11
1 vote
0 answers
71 views

How to change alsa sound output name

Alsa volume controller of spotifyd uses 'Master' for output and does not work on a PI. Checking alsamixer I saw that the output is called headphone. How can I change this value?
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1 vote
0 answers
81 views

Respeaker 4 install on Pi 3b and buster

I have just bought a respeaker 4 and successfully installed it by the looks of things - I have respeaker under the audio icon input tag. It is the classic rubbish install process with the script just ...
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  • 109
1 vote
0 answers
290 views

Play audio on two sound cards at the same time

I currently try to setup my raspberry pi 3 with a HiFiBerry DAC+ Pro XLR (using Raspian based on Debian 10). I installed the sound card and configured alsa to use device 1 as new default. Restarted ...
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  • 111
1 vote
0 answers
246 views

Change Default Microphone

I am having trouble changing my default mic on raspbian buster lite (kernel 4.19.36 on the 3B+). I know that the mic is fully functional because when I run: arecord -D plughw:1,0 --duration=3 test.wav ...
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  • 111
1 vote
0 answers
349 views

Route native Alsa app audio to bluetooth speaker with Pulseaudio?

I have an app that only supports Alsa, and I want to route its audio to a Bluetooth speaker. I'm attempting to use Pulseaudio to do it if that is possible. The Bluetooth speaker is paired and I can ...
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  • 11
1 vote
0 answers
347 views

Getting gstreamer to produce out of usb-audio

I cannot get gstreamer on raspbian (buster) to play through a usb-audio device, despite other players (vlc, aplay) being able to do so. but i need gstreamer because of its API access, for mpd players ...
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  • 111
1 vote
0 answers
6k views

What does amixer cset numid=3 3 do?

In order to solve missing audio via HDMI with Raspberry Pi 4B (Raspian Buster) I came across amixer cset numid=3 2 which didn't do the trick for me. But randomly I checked numbers from 0 to 4 and ...
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  • 11
1 vote
0 answers
3k views

ALSA Errors on Pi 3B+ using SpeechRecognition and PyAudio (Original Post missing stuff)

Using PyAudio I simply ran this piece of code: import pyaudio p = pyaudio.PyAudio() for x in range(p.get_device_count()): print(p.get_device_info_by_index(x).get('name')) Getting these Errors: ...
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1 vote
0 answers
582 views

Mopidy with PulseAudio sound over TCP

So I have been struggling with this for a while now and looked everywhere for solutions. I have installed Mopidy with Spotify extension on my Raspberry Pi 3B but I can't seem to get the pulseaudio ...
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1 vote
0 answers
126 views

Aux and HDMI audio options missing

Background (To give some perspective on the issue): I am using mopidy and mopify as an audio server on a Raspberry Pi 3 B+. WHen setting this up, I found that it would not output through a USB audio ...
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1 vote
0 answers
655 views

Connect Raspberry Pi via Bluetooth to Sound Bar

after spending the last couple of weeks trying to connect my bluetooth soundbar to my Raspberry Pi 3 B+ and playing all audio output on it I am close to giving up. Using the GUI I can successfully ...
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  • 11
1 vote
0 answers
194 views

Jackd problem on RPi3 B+ Stretch

I'm running Stretch on an RPi 3 B+. I have a C-Media USB sound card showing up as: card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio] and ALSA recognises it as the default card ...
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  • 11
1 vote
0 answers
2k views

PS3 eye's 4ch microphone with the Raspberry Pi

Recently I have been trying to get the 4ch microphone on the sony playstation 3 eye to work with my Raspberry Pi 3B (running the latest OS of raspian-stretch to date (2018-06-27 version) as a part of ...
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1 vote
0 answers
390 views

Audioinjector streaming over RTP input errors: "hw:0,0: Protocol not found", "Unknown input format: 'alsa'"

Using a RPI 3B running Debian Jessie, I've been trying to get a simple stream of the "flatmax" audioinjector's onboard mic over RTP to a VLC player. I've tried many different commands such as: ...
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  • 11
1 vote
1 answer
2k views

Why does device 0: bcm2835 ALSA on RPi 3 have 7 subdevices?

OK, so on Raspbian 9, on Raspberry Pi 3, if I try to list audio devices, I get this: pi@raspberrypi:~ $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: ALSA [bcm2835 ALSA], device 0: ...
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  • 201
1 vote
0 answers
599 views

Python Speech Recognition not detecting audio in script - Audio is detected in audacity and bash

I am trying to get python speech recognition (PSR) for a basic Pi project. I am using: OS: PRETTY_NAME="Raspbian GNU/Linux 9 (stretch)" NAME="Raspbian GNU/Linux" VERSION_ID="9" VERSION="9 (stretch)"...
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1 vote
0 answers
338 views

Unable to create a ALSA "multi" device from two USB sound cards

I'm trying to create one virtual 4 channel audio device in ALSA from two USB sound cards, using this tutorial: https://alsa.opensrc.org/TwoCardsAsOne My asound.conf looks like this: pcm.multi { ...
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