Questions tagged [alsa]

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

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redirect input audio to output with USB sound card

I am using rpi for airplay with same speaker that I use for my pc. So I don't want to deal with cables everytime when I pass to rpi from pc. Can I connect audio output of pc to input of rpi and get ...
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0answers
2k views

Does this show PyAudio is unusable with RaspberryPi's built-in audio?

When using PyAudio with the RaspberryPi's built-in audio snd_bcm2835, we get this strange behaviour: python test.py # ... after 10 or 15 seconds the sound is stuttering! This problem doesn'...
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0answers
2k views

How to record sound in buffer using ALSA [closed]

I'm begining to learn linux and ALSA and I was wondering if there is a way to store the sound I record from a microphone a directly to the buffer. I read here how to make my recording program. But ...
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1answer
5k views

ALSA volume lower after reboot

My ALSA sound volume gets mysteriously reset every time I do a reboot. I set the default ALSA volume to 100% with amixer cset numid=3 100%. Then I do a reboot and check my amixer volume again and ...
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0answers
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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1answer
425 views

Why am I getting the warning Hardware is initialized using a generic method in alsa setup?

I am getting the warning in the alsa setup when my raspbain is booting. The error or warning is: Hardware is initialized using a generic method Why am I getting this one? I changed few alsa ...
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0answers
1k views

Is there any way to record audio output by using command line?

I'm trying to record the audio output of my pi but i can't find any good solution. I tried to use arecord but it fails because I don't have any input devices. Because of this my idea was to redirect ...
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0answers
508 views

avconv version 9.14 streaming video (using UV4L driver RaspiCam) and video (using ALSA) to ustream, no audio

I'm using avconv to read from /dev/video0 (which is attached to my RPi camera via UV4L) and also reading audio from my microphone using ALSA and stream it live on ustream.tv. It works just fine to ...
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0answers
1k views

Raspberry Pi USB Soundcard - Outputting from multiple programs

On the raspberry pi, using the internal sound card by default you can output audio from multiple programs simultaneously and it mixes them together. Since switching to a USB soundcard (merely by ...
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1answer
3k views

How to make PocketSphinx use ALSA? (instead of pulseaudio or jack)

I've been struggling to make pocketsphinx work with the audio system of my raspberry pi. As stated in pocketsphinx's website, one of the steps to build it for a raspberry pi is to execute this: ./...
2
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1answer
913 views

Constant Stream of Distortion/Noise from 3.5mm Jack

I've been trying to set up audio playback on my Pi model B (running Raspbian, fully updated at the time of this posting), but I'm having issues with overpowering distortion. In the broader scheme I'm ...
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1answer
12k views

How to get alsa-lib on raspbian?

Apt-get is unable to get it, although I see that there is libasound2 installed, which is the same thing. I am trying to compile vlc from source, and it requires alsa-lib. Perhaps I could somehow use ...
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2answers
2k views

USB external sound card and Minimodem Software

I am trying to configure the Raspberry pi in order to work with the Minimodem software, which is software modem that uses FSK modulation and demodulation to transmit information over audio signals. I ...
1
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1answer
1k views

Wrong ALSA volume when starting playback

I run into the same problem than exposed in this post: ALSA volume ignored when beginning playback Here is the context: OS: raspbian Kernel 3.10.36+ #665 just updated the firmware with rpi-update ...