All Questions
49 questions
0
votes
0
answers
67
views
snd_pcm_wait timeout with USB driver and certain buffer sizes
I'm testing audio playback using ALSA on Ubuntu 22.04, using USB audio devices that I think use the USB class audio driver.
I've found that for certain ranges of buffer size, snd_pcm_wait() always ...
- 61
0
votes
0
answers
2k
views
Getting error: Unable to open slave... Alsa error
GETTING ERROR: Unable to open Slave. Why I don't know what to do here? I use Ubuntu
I tried this
sudo apt-get install alsa-utils
But I already have it but still nothing changed.I also did some other ...
1
vote
1
answer
602
views
Pyttsx3 Ubuntu aplay:main:831 Error audio open error
I've been trying forever to get my pyttsx code working. I am working in a Github codespace based on Linux Ubuntu. Since it is not my own I can't access any of its settings.
enter image description ...
- 36
0
votes
1
answer
205
views
Unclear sound or high pitched noise when recording with ALSA on NanoPi NEO
I'm struggling with ALSA examples that can be found in Linuxjournal
I copied over the code into the .c files and compiled them gcc -Wall Record_Listing4.c -lasound -o record into executables:
Listing3 ...
0
votes
2
answers
8k
views
PulseAudio: Unable to Connect: Connection refused in LibGDX
I got this error in IntelliJ while trying to set up LibGDX. I'm running PopOS (Ubuntu-based). Any help?
ALSA lib ../../pulse/pulse.c:242:(pulse_connect) PulseAudio: Unable to connect: Connection ...
- 23
2
votes
0
answers
390
views
Python PyAudio fix warnings
In Ubuntu Desktop 21.10 LTS i have the following errors - warnings:
chris@chris-Inspiron-3847:~/Documents/papinhio-player/database/init$ python
Python 3.9.7 (default, Sep 10 2021, 14:59:43)
[GCC 11.2....
- 2,353
1
vote
1
answer
175
views
Something wrong with ALSA configurations cant figure out what
I am using Ubuntu 20. I typed sudo nano /usr/share/alsa/alsa.conf and got the following output: output of the above command
I don't know if there is something wrong with it, but whenever I try to run ...
- 13
1
vote
0
answers
510
views
modprobe snd-dummy on linux server, ffmpeg -f alsa is recording noise
Some people say that the parameter fake_buffer can remove the noise, but I tried it and there is still noise
modprobe snd-dummy fake_buffer=0
#modprobe snd-dummy fake_buffer=0
# lsmod |grep snd
...
- 11
0
votes
0
answers
219
views
No output in speech recognition module of python
When i run below python script it shows some error.
import speech_recognition as s
sr=s.Recognizer()
print("Please, speak now....")
with s.Microphone() as m:
audio=sr.listen(m)
...
- 25
1
vote
0
answers
157
views
ALSA error shown when instatiating sr.Microphone()
I am trying to make a small speech recognition app using Tkinter and speech_recognition. I am able to instantiate the recognizer object, but when i try to instantiate the microphone object, i get ...
- 11
0
votes
2
answers
2k
views
Linux: Linking with Alsa undefined references
Experienced C++ dev here (although not a whole lot of in-depth experience with the underlying details of compilers/linking). I'm on Ubuntu 16.04, and can't seem to link against the alsa library. I ...
1
vote
0
answers
4k
views
Function auto mute in alsamixer is used for what?
I'm now writing a program (c and c++) using alsamixer on ubuntu. But I have a problem that sometimes my alsamixer goes back to mute. I think the reason is the function auto mute of alsamixer. But I do ...
- 45
1
vote
2
answers
433
views
USB midi keyboard detected by amidi but not by java
I'm using an Edirol PCR keyboard connected by USB to my laptop running Ubuntu 18.04.2 LTS.
I get the following output from amidi -l:
Dir Device Name
IO hw:1,0,0 PCR MIDI
IO hw:1,0,1 PCR 1
I ...
- 119
0
votes
0
answers
717
views
How to inform vlc regarding audio sample rate of the device in ubuntu
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 ...
4
votes
1
answer
6k
views
linux pipe audio to virtual microphone using pactl
I found an example that shows how to pass a wave file as microphone input by utilizing "pactl load-module module-pipe-source". The issue with this example is that it relies on an infinite while loop ...
0
votes
1
answer
519
views
ALSA on RPi3 inside Docker with Chromium looses audio randomly
What is the setup
I'm running Chromium 66.0.3359.181 inside Docker container running Ubuntu 16.04.4 on top of Alpine 3.7, all this Raspberry Pi 3.
What I'm trying to achieve
I want to run an HTML5 ...
- 1,232
1
vote
1
answer
6k
views
Sound on system but pulseaudio access denied issue
I'm having an issue with PulseAudio and also since many days that give me some headaches...
I've to sound on my system, no problems with that (both firefox and Spotify works) but I've issues in the ...
- 11
0
votes
1
answer
2k
views
Portaudio select input device for capturing
I face some problems with set up input device for portaudio.
I have 2 cards 0 and 1, and I want to configure:
card 0 for capturing, card 1 for playing.
So, I edit asound.conf like this:
pcm!....
0
votes
0
answers
291
views
I want to detect audio sources connected to Tx2 using program ioctl/gstreamer (ubuntu)
I want to detect which all audio device connected to Tx2 BOARD, and which of
them are recording.
i tried many thing but those didn't work. Below are the details.
I have done for video device ...
- 41
0
votes
0
answers
2k
views
Travis-CI : ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
I have an open source project that implements - next to other functionality - a media player that is supposed to be remote controlled.
The source code is available under https://github.com/wzr1337/...
- 3,757
-1
votes
1
answer
96
views
Fix microphone volume for a user [closed]
I need to fix the microphone volume for any user in Ubuntu 16. What I want is to fix the volume, say, to %40, and keep it at that value for all times. It must be changed by no user except root. How ...
1
vote
1
answer
2k
views
How can I get volume level (or dB) of microphone input with alsa API?
I can do it with command line : arecord -vv , but I need to finish it with code , I don't known which API can make it .
- 11
5
votes
0
answers
3k
views
kvm/qemu - Audio from windows guest to host without spice
I am trying to get my Windows 10 domain working with qemu using virt-manager.
Everything seems to work fine (GPU passthrough, CPU), except when I am running the spice console in order to hear the ...
0
votes
1
answer
3k
views
How to use alsa sound and/or snd_pcm_open in docker?
I am running an Ubuntu 12.04 Docker container on an Ubuntu 16.04 host. Some test code I have exercises 'snd_pcm_open'/'snd_pcm_close' operations with the SND_PCM_STREAM_PLAYBACK and ...
- 788
0
votes
1
answer
196
views
Alsa Driver Ubuntu Compiler error when running 'configure' for installation
When running configure in alsa driver installation, I get the error like this
checking for GCC version... ./configure: eval: line 3547: syntax error near unexpected token `)'
./configure: eval: line ...
- 3,076
1
vote
0
answers
341
views
Strange ALSA monitor device behaviour
Faced strange ALSA monitor device behaviour while recording sound using C++ with Qt 5.5.1 framework on Ubuntu 16.04.1 amd64. Count of bytes read from monitor device (input device which replays sound ...
0
votes
1
answer
190
views
Cadence not showing ALSA driver tab
I recently reinstalled Cadence and the ALSA tab no longer appears in the configuration. How can I get it back?
- 41
2
votes
1
answer
1k
views
How can I record that sound going out of my speakers (not what's coming into the mic)?
I'm trying to record the sound my computer produces (without using a microphone)
I've found these two commands that work to record my microphone output into files:
# creates mp3
arecord -f cd > ...
- 26.7k
0
votes
1
answer
1k
views
Python alsaaudio capturing sound
I'm trying to capture data from microphone. Code is pretty simple but I get the error alsaaudio.ALSAAudioError: Capture data too large. Try decreasing period size for some reason. Tried google it but ...
- 1,401
0
votes
0
answers
172
views
ALSA error messages pyaudio [duplicate]
Have some ALSA error messages. Everything work well, but it bothers me. I'm using pyAudio 0.2.9, Ubuntu 15.10 x64, python3.4. Is any solutions to ignore this?
ALSA lib pcm_dmix.c:1024:(...
4
votes
2
answers
2k
views
How to change between speakers and USB headset using a script on Ubuntu?
I am trying to write a script to change between speakers and headset. I want to be able to change the output and the input with a shortcut.
I used these commands to see my audio devices :
$ pacmd ...
- 1,142
6
votes
1
answer
20k
views
ALSA lib pcm_hw.c:1667:(_snd_pcm_hw_open) Invalid value for card arecord: main:722: audio open error: No such file or directory
i am working on speech recognition . for this i am using "alsa-utils" but when i try to use this script
#!/bin/bash
echo “Recording… Press Ctrl+C to Stop.”
arecord -D plughw:1,0 -q -f cd -t wav ...
- 12.6k
0
votes
1
answer
685
views
QAudioDeviceInfo::availableDevices does not refresh
On a PC w/ Ubuntu 14.04, Qt 5.5.0 & Bluez 4.101-0ubuntu13.1, I'm trying to play audio to BT sink devices over A2DP.
To do so, I'm connecting to those devices using Bluez and then play to it using ...
- 403
1
vote
1
answer
3k
views
PyAudio not capturing correct audio data
I can't get a PyAudio stream to capture audio data from my USB microphone.
I'm running a Python program on Ubuntu trusty (Ubuntu 14.04.3 LTS). I've configured ALSA to set my USB microphone as the ...
- 4,740
2
votes
2
answers
3k
views
Linux ALSA Driver using channel count 3
Am running my ALSA Driver on Ubuntu 14.04, 64bit, 3.16.0-30-generic Kernel.
Hardware is proprietary hardware, hence cant give much details.
Following is the existing driver implementation:
Driver ...
- 33
1
vote
3
answers
2k
views
error in Ubuntu when running portaudio example
I installed portaudio on Ubuntu 14.04 and compiled a test program as follows:
gcc -o Test3c Test3c.c ../libportaudio.a -lrt -lasound -ljack -lpthread -lm
which had no errors. (Test3c.c is the same ...
- 409
0
votes
2
answers
210
views
How to determine the last time the audio device was playing a file?
I would like to use C in order to get the last time the soundboard was playing a file. Is there a way I could do that?
- 238
6
votes
2
answers
3k
views
ChucK Audio Input/Output Error in Ubuntu
I installed ChucK in my Ubuntu 12.0.4 VirtualBox. When I started the miniAudicle Virtual Machine, I got a pop up error message
"The Virtual Machine appears to be hanging.......Abort the current ...
- 739
7
votes
1
answer
5k
views
Adding multiple Loopback Alsa devices in ubuntu [closed]
I need to create virtual loopback alsa sinks in my ubuntu setup. I can create one by adding the following to /etc/modprobe.d/sound.conf
alias snd-card-0 snd-aloop
options snd-aloop index=21 ...
- 858
2
votes
1
answer
515
views
choppy sound on alsa after 30 min
I am writing to alsa in 10ms period to play music, it works great at beginning, however, it has some choppy sounds after 30min playing, and the choppy sounds only lasts for a few mins.
Any ideas why?
...
- 317
1
vote
1
answer
2k
views
My speakers and headphones are not working on ubuntu 13.04 [closed]
I used to work on Ubuntu 12.10 but then suddenly my speakers stopped working, my headphones didn't used to work before and still they are not working, i then upgraded to 13.04 in hope that it may ...
- 197
0
votes
0
answers
101
views
Asound fails to play a sound
I’m trying to use asound to play some sound in C++, but I’m stick with this error:
Rate doesn't match (requested 44100Hz, get 0Hz)
I tested my program on an Ubuntu and it works, but definitely fails ...
- 2,002
3
votes
1
answer
4k
views
ALSA & Python - Capturing multiple mono audio inputs
I'm using the python audio alsa library to interact with my M-Audio Delta 1010LT PCI audio interface. This audio interface has 8 analog inputs. I'd like to analyze the signal of one specific mono ...
5
votes
0
answers
1k
views
GStreamer Custom-Plugin and alsasink Unable to Detect Format
I'm developing a GStreamer plugin following the GStreamer Plugin Writer's Guide and using gst-element-maker from the gst-plugins-bad repository with the base class set to basetransform. As a starting ...
- 1,781
5
votes
3
answers
17k
views
How do I configure JACK audio server to automatically use a specific card?
I'm running Ubuntu 12.04 studio on a HP Pavilion dm1 4200sg netbook. It's pretty much a fresh install. I try to start jackd server by running
jackd -R -d alsa
and it fails with output:
JACK server ...
- 5,182
25
votes
6
answers
32k
views
How to programmatically change volume in Ubuntu
How do you programmatically change volume in Gnome on Ubuntu, either from the command line or an API (Python preferrably)?
The only answers I found to similar questions use amixer, which seems to ...
- 64.5k
6
votes
1
answer
3k
views
Use ALSA pcm outputs via the Java SoundSystem
I have a sound card with multiple outputs and use ALSA to map them to 2 separate stereo channels. The configuration works fine and allows me, for example with speaker-test to play audio on them.
I ...
- 1,069
1
vote
1
answer
1k
views
C code for tone generator in linux
I want to write a c code to generate tone using array output to DAC in ubuntu. (preferably alsa driver)
For example:
I need to be able to send voltage output to DAC like 1100000 etc. to be able to ...
- 1,561
1
vote
2
answers
2k
views
How to connect to ALSA server (in this case, Timidity) in Ubuntu using C++?
I am trying to use MIDI under Linux Ubuntu with C++. After a day of using several tools (e.g., JACK) with no success (JACK lags like mad on my machine), I am now trying to use Timidity as the MIDI ...
- 27.1k