For questions pertaining to ALSA, the Linux sound subsystem. ALSA sits below advanced systems like PulseAudio.
0
votes
0answers
16 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 ...
0
votes
0answers
19 views
ALSA RPI - Can I create a virtual array of microphones using two different input devices?
I have two PS3 eye (each one has an array of 4 mics) and I was wondering if I could create a virtual microhpone array using ALSA to acquire and use the two devices as if it was one array with 8 ...
1
vote
1answer
37 views
Command aplay does not work without sudo
The command aplay only works if preceded by sudo. omxplayer test.wav will play the audio I recorded with arecord just fine. aplay text.wav does not, but sudo aplay test.wav does. The suggestions from ...
0
votes
0answers
29 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:
...
0
votes
0answers
28 views
ALSA errors with FLDIGI on a Rpi3b+
I wanted to install the latest version of fldigi on my rpi laptop. I have previously installed the version listed in the synaptic manager but then uninstalled that and installed the latest version ...
1
vote
0answers
22 views
RPi3 B+ Stretch. Config for external capture device & onboard headphone jack
I am planning to use an external Microphone "ReSpeaker 4Mic Hat" from Seeed-Studio on my RPi3 B+ Stretch OS. However, when I run alsamixer, my external Mic is not the default capture device. It seems ...
0
votes
0answers
29 views
Chromium and ALSA route problem
I have set up a virtual device in asoundrc which works in Audacity but when I open it using the Chromium --alsa-input-device flag I get the following error:
Rate doesn't match (requested 48000Hz, get ...
0
votes
1answer
47 views
Alsa combine 4 mono usb microphones into 1 stereo device
Based on this post: https://raspberrypi.stackexchange.com/a/58174 I was able to get 4 usb microphones to behave as 1 device with 4 channels. What I am looking to do is down mix the 4 microphones into ...
0
votes
0answers
31 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) ...
0
votes
0answers
66 views
Use USB Mic simultaneously with RTSP Server and pyaudio
I'm building a baby monitor based on Raspberry Pi. I use Picam and rtsp-server to stream the pi camera and the sound of the USB Microphone to a video view in an android app.
At the same time pyaudio ...
0
votes
0answers
43 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: ...
0
votes
0answers
31 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 {
...
0
votes
0answers
192 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 ...
2
votes
3answers
110 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 ...
0
votes
0answers
160 views
installing PulseAudio completely disables microphone and audio output configured in ALSA?
I spent a few days getting an I2S microphone and a speaker that was soldered into the proper jacks below working with ALSA. To accomplish this, I tweaked the .asoundrc file to modify the defaults, and ...
0
votes
1answer
31 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
votes
0answers
104 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/...
3
votes
1answer
3k 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 ...
0
votes
1answer
321 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 ...
0
votes
0answers
113 views
Rpi-3 Jessie, omxplayer plays .wav files but aplay does not. Also I cannot record audio via bluetooth audio
I am using Rpi 3 model B with Jessie, kernel 4.4.34. I can play the .wav audio file using omxplayer, but it does not work with aplay or cvlc. I am trying to send Bluetooth audio from a Master Rpi to ...
0
votes
0answers
972 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 ...
1
vote
1answer
57 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;
...
0
votes
1answer
539 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 ...
1
vote
1answer
218 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 ...
1
vote
0answers
278 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)"...
1
vote
2answers
316 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 ...
3
votes
1answer
1k 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 ...
0
votes
1answer
52 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
vote
0answers
117 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 ...
1
vote
0answers
205 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
votes
0answers
198 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 ...
0
votes
1answer
357 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 ...
0
votes
0answers
60 views
How can I play multiple audio at once with loopback?
I am using loopback devices so that I can play music from VLC and stream it directly to my Ices2 source which will then feed it to my IceCast Server.
Problem is I want to be able to play multiple ...
0
votes
1answer
243 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-...
1
vote
0answers
58 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 {
...
7
votes
3answers
2k 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 (...
0
votes
0answers
134 views
recompile ffmpeg for alsa
I realised that in order to stream video and audio to YouTube from the Raspberry Pi, I needed to have 'alsa' compiled. When i compiled ffmpeg I did not have alsa support therefore I get the error:
...
0
votes
0answers
526 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 ...
0
votes
1answer
94 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 ...
0
votes
0answers
482 views
Google AIY Voice Hat from Magpi 57 Microphone doesn't work
I've setup the google voice hat successfully but it seems that the microphone is broken.
I tried to verify it with arecord and aplay but it only records a very loud noise. Using the Google AIY "Check ...
0
votes
0answers
506 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(...
1
vote
1answer
1k 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 ...
1
vote
1answer
3k 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:
...
0
votes
1answer
19 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 ...
1
vote
0answers
376 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
votes
1answer
1k 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,...
2
votes
1answer
335 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 ...
0
votes
2answers
1k 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 ...
2
votes
1answer
460 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 #...
1
vote
0answers
1k 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 ...
