Questions tagged [alsa]

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

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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
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 ...
1
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1answer
2k views

using php_exec command to play audio on the Pi - no audio group

I'm trying to have a php script play an audio file when run shell_exec('aplay /home/andrew/www/audio/meeting-bell/medium-bell.wav') It works when I run it from the command line, but not when running ...
2
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4answers
2k views

Controlling a servo and playing sounds

I've got a serious problem about Pi. It is - I can play sound just fine with a python script either with: import pygame pygame.mixer.init() pygame.mixer.Sound("...").play() or: import os os.system("...
2
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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 ...
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 ...
3
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1answer
4k views

MIDI keyboard latency with fluidsynth

I set up my MIDI keyboard with fluidsynth on raspbian, mostly according to this how to. It all works fine, but I've got a ~1 second latency. Does anybody know how to fix this issue? RPi model: B ...
2
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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 ...
3
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1answer
4k 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 ...
3
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2answers
4k views

No Audio Output on 3.5mm Jack

I have a Raspberry Pi B running Arch ARM. I have setup NFS with my media server. I'm trying to stream music from it and play it with mdp through ncmpcpp (with alsamixer). I have tried turning up the ...
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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 ...