PulseAudio on OpenWRT with MPD and other Stuff: Difference between revisions
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===ALSA Related Commands=== | ===ALSA Related Commands=== | ||
alsactl : Good for testing basic sound device settings (Top Tip: By default, for whatever reason, the "state" (AKA stored configuration) Directory (/var/lib/alsa) does not exist, so create it. | alsactl<span> </span>: Good for testing basic sound device settings (Top Tip: By default, for whatever reason, the "state" (AKA stored configuration) Directory (/var/lib/alsa) does not exist, so create it. | ||
aplay -D stereoB BeeGees.wav | aplay -D stereoB BeeGees.wav | ||
aplay -D hw:0,0 -c 6 BeeGees.wav -vv : Will show information and a 'meter', along with playing the song. | aplay -D hw:0,0 -c 6 BeeGees.wav -vv<span> </span>: Will show information and a 'meter', along with playing the song. | ||
speaker-test -D hw:0,0 -c 4 --chmap=FL,FR,FC,LFE -t wav : Tests the speaker output (make sure alsa-utils-tests is installed), --chmap "allows for putting things in a different order". | speaker-test -D hw:0,0 -c 4 --chmap=FL,FR,FC,LFE -t wav<span> </span>: Tests the speaker output (make sure alsa-utils-tests is installed), --chmap "allows for putting things in a different order". | ||
/var/lib/alsa/asound.state : Filie in a Directory (gonna have to create the 'alsa' sub-directory manually as it isn't created during ALSA installation) that preserves settings in ALSA Mixer | |||
amixer -c 0 sset 'PCM Capture Source' 'Line' : A handy command to change the input of a USB Audio Device that support more than one input / source. Keep in mind the two items in the quotes ( 'PCM Capture Source' and 'Line' ) are potentially unique to every USB Audio Device. How can one get that information? A couple commands (some noted below with details, but for now, just the commands): amixer scontrols (that's two words / commands typed together) and then: amixer -c 0 get 'PCM Capture Source' ( again, modify the item in ' ' (quotes) to the name obtained in the previous command) | alsactl store | ||
speaker-test -D hw:0,0 -c 8 --chmap=FL,FR,FC,LFE,SL,SR,SL,SR -t wav<span> </span>: For testing 7.1 surround sound, with a catch: Ain't no RL (Rear Left) or RR (Rear Right), there are two SL (Side Left(s)) and two SR (Side Right(s)). Hey, it is what it is. Now you know. | |||
amixer -c 0 sset 'PCM Capture Source' 'Line'<span> </span>: A handy command to change the input of a USB Audio Device that support more than one input / source. Keep in mind the two items in the quotes ( 'PCM Capture Source' and 'Line' ) are potentially unique to every USB Audio Device. How can one get that information? A couple commands (some noted below with details, but for now, just the commands): amixer scontrols (that's two words / commands typed together) and then: amixer -c 0 get 'PCM Capture Source' ( again, modify the item in ' ' (quotes) to the name obtained in the previous command) | |||
alsamixer: shows a text GUI of controls | alsamixer: shows a text GUI of controls | ||
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amixer scontents<span> </span>: Shows a detailed list of devices | amixer scontents<span> </span>: Shows a detailed list of devices | ||
amixer -c 0 get 'WhatEverNameOfDevice' : 'Gets' the 'capabilities' of an 'item' / device ( WhatEverNameOfDevice can be obtained with the amixer scontents command above) | alsactl info : Shows information about sound device | ||
amixer -c 0 controls : Shows detailed information about the controls_count variable from alsactl info | |||
amixer -c 0 cget numid=1 : Shows even more detailed information about the 'control' from amixer command above | |||
amixer -c 0 get 'WhatEverNameOfDevice'<span> </span>: 'Gets' the 'capabilities' of an 'item' / device ( WhatEverNameOfDevice can be obtained with the amixer scontents command above) | |||
Example below;<syntaxhighlight lang="text"> | Example below;<syntaxhighlight lang="text"> | ||
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The error will be: pa_context_connect() failed: Connection refused | The error will be: pa_context_connect() failed: Connection refused | ||
=== Web / HTML GUIs === | |||
==== amixer-webui ==== | |||
opkg install git git-http python3 python3-pip (assumes ALSA is installed already) | |||
pip3 install flask | |||
git clone <nowiki>https://github.com/JiriSko/amixer-webui.git</nowiki> | |||
./alsamixer_webui.py -p 8080 -l W.X.Y.Z (where W.X.Y.Z is the IP Address of the router) | |||
==== amixer-web ==== | |||
...won't work as OpenWRT doesn't have the ALSA Mixer "library.so" files or packages | |||
==== viacast - alsamixer ==== | |||
Looks great. Doesn't work (even though it shows the correct USB realtek chip). On a side note, REACT installs and works on OpenWRT (Hmmm, a good thing???) | |||
===Useful Commands for Testing (from a live file, hence the # Comment Tags)=== | ===Useful Commands for Testing (from a live file, hence the # Comment Tags)=== | ||
==== Multi-Channel Testing (first need a multi-channel file) ==== | |||
sox CominUnderFire.mp3 --show-progress -t wav CominUnderFire_6ch.wav remix 1v0.8 2v0.8 1v0.5 2v0.5 1v0.3 2v0.3 | |||
Input File : 'CominUnderFire.mp3' | |||
Channels : 2 | |||
Sample Rate : 44100 | |||
Precision : 16-bit | |||
Duration : 00:04:14.49 = 11223097 samples = 19086.9 CDDA sectors | |||
File Size : 10.2M | |||
Bit Rate : 320k | |||
Sample Encoding: MPEG audio (layer I, II or III) | |||
Comments : | |||
Title=08 - Comin' Under Fire | |||
Artist=Def Leppard | |||
Album=Pyromania | |||
Tracknumber=8 | |||
Genre=Power Metal | |||
In:100% 00:04:14.48 [00:00:00.01] Out:11.2M [ | ] Hd:2.6 Clip:0 | |||
Done. | |||
<nowiki>###</nowiki> Useful Commands for testing stuff; | <nowiki>###</nowiki> Useful Commands for testing stuff; | ||