audio.rst
author Oleksandr Gavenko <gavenkoa@gmail.com>
Mon, 22 Feb 2016 12:41:52 +0200
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child 1905 fba288d59662
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Decrease intent to increase space usage on mobile.
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.. -*- coding: utf-8; -*-
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.. include:: HEADER.rst
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========
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 Audio.
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========
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.. contents::
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Sound in Debian.
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================
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 * http://wiki.debian.org/ALSA
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 * http://wiki.debian.org/SoundFAQ
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Test speaker and microphone.
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============================
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To configure audio devices::
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  $ alsamixer
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  $ pavucontrol
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To hier voice from mic in speaker::
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  $ arecord | aplay
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  $ arecord -f cd | aplay -f cd
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To list of available devices::
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  $ aplay -l
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  $ aplay -L
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  $ arecord -l
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  $ arecord -L
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  $ pactl list
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Play simple sounds.
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===================
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::
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  $ sudo apt-get install sox
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  $ play -n synth sin 440 vol -40dB
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  $ play -n synth 10 square 100-10000 synth sin fmod 100 vol -40dB
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Check HDA params.
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=================
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::
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  $ sudo apt-get install alsa-tools-gui
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  $ hdajackretask
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See also:
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  http://www.alsa-project.org/main/index.php/HDA_Analyzer
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    provides a graphical interface to access the raw HD-audio control
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Suitable convertors?
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====================
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::
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  $ sudo apt-get install ffmpeg
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or::
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  $ sudo apt-get install sox
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List of sox supported format: See sox(1).
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List of ffmpeg supported format::
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  $ ffmpeg -formats
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How convert amr to ogg/mp3?
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===========================
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TODO
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How easy convert between mp3/wav/ogg?
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=====================================
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::
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  $ sox in.mp3 out.ogg
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  $ sox in.ogg out.wav
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  ... etc
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How convert flac to mp3?
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========================
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::
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  $ flac -c -d $file.flac | lame -m j -q 0 -V 0 -s 44.1 - $file.mp3
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How convert wma to mp3?
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=======================
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::
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  $ mplayer -vo null -vc dummy -af resample=44100 -ao pcm:waveheader $file.wma
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  $ lame -m s audiodump.wav -o "$file.mp3
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  $ rm audiodump.wav
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How convert m4a to mp3?
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=======================
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::
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  $ faad -o - $file.m4a | lame -V 0 - $file.mp3
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How split mp3/ogg files?
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========================
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Split mp3 and ogg files::
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  $ mp3splt
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See::
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  http://mp3splt.sourceforge.net/mp3splt_page/home.php
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                home page