Questions tagged [alsa]

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

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128 views

When trying to play recorded audio file using aplay, gets an error saying No such file or directory

I'm trying to record and play recorded audio file. I use Armbian. I recorded a audio using arecord -D plughw:0,0 --duration=10 test2.wav command. When I'm trying to play that audio file(test2.wav) ...
2
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1answer
461 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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0answers
143 views

Difference between sound and audio nodes in RPi 3 device tree?

I looked a bit into the device tree of Raspbian 9 on Raspberry Pi 3, using: dtc -I fs /proc/device-tree > myrpi-dev-tree.txt 2>&1 I've noticed there is a node called audio: audio { ...
2
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0answers
962 views

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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3answers
2k views

Pygame and Alsa lib error

I am running a pygame window on a raspberry pi. The raspberry pi is connected to an lcd through gpio (not hdmi). My pygame script does not contain any mention of audio, only some basic rectangle ...
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1answer
58 views

Why does out123_open () shut down my sound card?

I'm talking about this function call: r = out123_open (sound::mp3_output_handle, "alsa", NULL); The return value of r is then OUT123_OK, but in the same moment, the status LED on my sound card (...
2
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0answers
293 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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1answer
31k views

How can I use an external USB sound-card and set it as default?

I've got an external USB sound-card from C-Media running on my RPi3. I can play some recordings using aplay/arecord by specifying the card index and ALSA plugin. However, many other sound files does ...
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1answer
605 views

OMXplayer play video with no sound and mp3 at 2/4 times the speed

Using a USB sound card, I'm trying to play mp3 files, with the default omxplayer. But although all other software works fine, omxplayer play my mp3 files at 2x speed, sometimes even 4 times. Is ...
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1answer
4k 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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1answer
234 views

How do I configure the alsa driver in out123?

I'd like to play MP3 files on my Raspi 3B by using mpg123, so I added (among others) the following lines of code into my app: r = mpg123_init (); if (r != MPG123_OK) { ret -= r; ...
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1answer
1k views

Use internal sound card speaker and USB MIC as default

Problem I'm using UV4L for audio/video streaming. I'm using 3.5mm speaker, and usb microphone UV4L uses default audio/video device for streaming, but only audio work. USB MIC doesn't work. But ...
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1answer
657 views

Issues accessing a microphone from Node on Pi Zero

I am having issues using a microphone in a Node script. The microphone (a SEEED Array mic) works when running the command line: arecord -D plughw:1 --duration=10 -f cd -vv ~/rectest.wav It does not ...
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0answers
519 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)"...
2
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2answers
877 views

Full duplex audio over i2s (Adafruit MEMS + DAC)

I have setup a pi-zero with digital mems mics from Adafruit, and also the digital DAC. I can use arecord to record stereo audio, and then aplay to playback the audio over the DAC. Interestingly, the ...
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1answer
4k views

Software audio mixer

I need to be able to simultaneously play several files on my headless Raspberry Pi and dynamically changing their volumes, preferably with Python. I managed to get it to work with the swmixer Python ...
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1answer
99 views

View Twitch stream on rPi, but with sending the stream audio to Windows?

What: I want to display a Twitch video stream locally (on the rPi, over HDMI) but send the audio to a desktop on the same network. Why: To free up video resources for other things (gaming, bitcoin ...
1
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1answer
331 views

USB speaker … ALSA error “rate doesn't match”

I've connected a USB speaker to my Raspberry Pi Zero, and modified /boot/config.txt to set dtparam=audio=off. Running speaker-test now sends test audio to the speaker. But, when I attempt to run a ...
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0answers
456 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 ....
2
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0answers
443 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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1answer
650 views

How do I get my I2S microphone on a Pi zero W working again after running rpi-update?

I have an I2S breakout microphone from adafruit which I got working last week. However due to problems with my pi camera I ran rpi-update, and following this my microphone is not working. I ...
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1answer
578 views

How can I play some MP3 or OGG file on the JustBoom DAC HAT?

I recently installed a JustBoom DAC HAT on my Raspberry Pi 3, but I can't make it play a sound by using ALSA or PulseAudio. alsamixer lets me configure the HAT, apparently without problems, but test-...
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0answers
193 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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4answers
5k views

I2S DAC device support (kernel drivers?) and noise (“pop”, “crackle”) on playback

I am trying a Adafruit I2S 3W Stereo Speaker Bonnet for Raspberry Pi - Mini Kit, which is built around two MAX98357 (datasheet: adafruit, maxim), on a Raspberry Pi Zero W with Raspbian Stretch (...
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1answer
1k views

ALSA + usb microphone issue on rapsberry pi 1 (ARMv6, Raspbian/jessie): lsusb not listed AND Device or resource busy

I am trying to do Alexa on raspberry pi. Before I do that, I need to get my speaker and microphone working. Try to keep it simple, I am trying to avoid pulseaudio and stick with ALSA. So, the speaker ...
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1answer
376 views

Push alsa capture volume over limit on USB headset

I want to push capture volume on my RPi3 with ALSA of my USB headset (microphone) over the limit that is, in my case, 6 dB. I tried every example i've found and the only reasonable way seems to be to ...
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0answers
1k views

How to Build a Vu meter with LEDs?

The following code is a python code for a Vu meter with Raspberry Pi import alsaaudio as alsa import time import audioop import math import RPi.GPIO as GPIO import time def ON(pin): GPIO.output(...
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1answer
4k views

Configure ALSA Sound card

I have 2 playback device where one is HDMI and the other is HAT sound card. The requirement is to play audio from card 0 or 1 without rebooting the system. aplay -l **** List of PLAYBACK Hardware ...
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1answer
5k views

FFMPEG: Unknown input format: 'alsa'

I have a Raspberry Pi 3 and I keep trying to install FFMPEG, but whenever I try to record audio through my USB webcam's mic with sudo ffmpeg -f alsa -i hw:1 -t 30 out.wav I get the following error: ...
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1answer
23 views

No audio from mpd via wlan0 after disconnecting eth0

Set-up: Raspbian Jessie Lite 4.9 Model B+ Edimax ew-7811un I'm running an internet radio stream to the built-in audio interface using mpd/mpc. And audio plays just fine as long as the ethernet ...
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0answers
809 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 ...
0
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1answer
2k views

arecord throw Input/Output error

When trying to run the following command, I am getting Input/Output error pi@raspberrypi:~ $ sudo arecord -Dhw:1,0 -d 10 -f cd -t wav test.wav Recording WAVE 'test.wav' : Signed 16 bit Little Endian,...
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1answer
618 views

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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2answers
3k views

Linux ALSA one sound card for input one sound card for output

I have a raspberry pi 3 model B+ with raspbian jessy lite from July. cat /proc/asound/version Advanced Linux Sound Architecture Driver Version k4.4.50-v7+. I have a USB soundcard that has two 3.5 ...
4
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1answer
2k views

Difference between “hwplug” and “hw”

This is aplay -l output from Raspberry Pi: **** List of PLAYBACK Hardware Devices **** card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA] Subdevices: 8/8 Subdevice #0: subdevice #...
2
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0answers
3k 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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1answer
226 views

How to capture decibels and pitch from microphone?

Instead of capturing the sound coming from the microphone, id just like to ping it every couple of seconds to capture the decibels and pitch as data points.
3
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0answers
1k views

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 ...
2
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0answers
547 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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2answers
3k views

Alsa volume control without amixer

Is there a way to control Alsa volume through software if I2S Dac (e.g. old Hifiberry) doesn't support software volume control (amixer is empty and if you add mixer it won't affect anything)? While ...
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1answer
476 views

How to play audio via a USB sound card using libao?

I get the following from aplay -l, lsusb. pi@raspberrypi:~ $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA] Subdevices: 8/8 ...
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0answers
2k views

Setting USB Sound Card to default device

I have been using raspberry pi 3 model B. And, I have installed raspbian jessie with pixel. I made work its camera without an error. I have bought USB sound Card. But, I couldn't make it to work. ...
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0answers
552 views

How to connect SSM2603 via I2C/I2S?

I'm trying to get the Audio Codec SSM2603 (as input device) to work with a RaspberryPI 3 running Raspbian. Im using a SSM2603-EVALZ. I compiled and installed the most recent kernel with SSM2603 ...
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1answer
440 views

gmediarender configure output mono

I have configured gmediarender on the RPi 3. However I prefer only mono output. Following this guide to downmix to mono did not output mono from the gmediarender. /etc/asound.conf pcm.card0 { ...
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0answers
464 views

Audio Issue with Multiple USB Sound Cards

I'm trying to build a simple python program that will capture audio from 2 different audio inputs and then play audio from 1 of them. I bought 2 USB sound cards so I could do this. I started with an ...
0
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1answer
7k views

Change usb soundcard device sample rate

I have two problems with my usb soundcard. It shows only single input channel (even though it is stereo capable , tested in Windows OS which correctly identifies as stereo ) Shows only supports 48000 ...
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2answers
574 views

Pocketsphinx not working; Input Overflowed -9981

I am trying to use pocketsphinx in Python using the code given below: #!/usr/bin/python from os import environ, path from pocketsphinx.pocketsphinx import * from sphinxbase.sphinxbase import * ...
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0answers
146 views

ALSAMIXER - corrupt file

Noob here, just getting set up for using our first rpi, and trying to use a usb webcam to record audio. We bought a starter kit, with Raspbian Jesse. Video works great from the webcam, but when we ...
2
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1answer
5k views

Setup output and input audio on different cards

I was trying to prepare my RPi for jasper and plugged the USB mic and the speakers in the 3.5 jack. Trying to configure it I found out that I could only chose that the whole audio IO is going through ...
0
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0answers
294 views

PocketSphinx - ALSA IOError: -9997 while trying to Decode Speech

I am trying to use Pocketsphinx for voice recognition. When I was trying to include it in python, using this file: #!/usr/bin/python from os import environ, path from pocketsphinx.pocketsphinx ...