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PulseAudio, previously known as Polypaudio, is a sound server for POSIX and WIN32 systems. It is a drop in replacement for the ESD sound server with much better latency, mixing/re-sampling quality and overall architecture.PulseAudio, previously known as Polypaudio, is a sound server for POSIX and WIN32 systems. It is a drop in replacement for the ESD sound server with much better latency, mixing/re-sampling quality and overall architecture. PulseAudio / Pulse Audio is a sound manager for [[ALSA]] on Linux, ALSA being the Advanced Linux Sound Architecture.[[Image:paprefsbridge.png]]<BR>''Illustration shows the paprefs interface, launched from console by typing: "paprefs" and the correct selection.''[[Image:pulseaudiosimsel.png]]<BR>''Illustration shows the Pulse Audio Volume Control Output Devices Tab with "Set as fallback" checked for "Simultaneous output to..." checked so programs send sound on all bridged devices.''=== pulseaudio-equalizer ===Your distribution may or may not have pulseaudio-equalizer as part of the main repository. sudo apt install pulseaudio-equalizerLaunch the mixer with qpaeqFor qpaeq to work you have to have the modules module-equalizer-sink and module-dbus-protocol set to load in the /etc/pulse/default.pa file sudo vi /etc/pulse/default.paadd load-module module-equalizer-sink load-module module-dbus-protocolFor more information on pulseaudio-equalizer visit [https://livingthelinuxlifestyle.wordpress.com/2018/08/13/how-to-install-pulseaudio-equalizer-in-ubuntu-and-linux-mint/ How to Install PulseAudio-Equalizer in Ubuntu and Linux Mint]Excerpt from [http://www.troubleshooters.com/linux/sound/sound_troubleshooting.htm Troubleshooting Linux Sound by Steve Litt] troubleshooting guide"{{:Speaker-test_stereo_separation_test_with_ALSA}} Steve says, "The speaker-test program provides a nice, easy way to provide input for your sound system. When used with no arguments, it simply supplies white noise to both speakers." Testing an M-Audio external USB sound board it was unclear as to whether or not stereo separation was functional or if the audio was monaural (mono) since the balance slider on audio players seemed to have zero impact. Elimination of audio application software is advised to find if ALSA and your wiring are correct. Use this command: speaker-test -c2 -t wavAs Steve advised in his article the command will alternate between left and right speaker audio dialog in a loop allowing you to listen and determine if the sound is coming from the speakers, the correct speakers and that you have functional stereo separation. You may find it useful to ensure you do not have intended left speaker audio coming out of your right speaker. If you have more than 2 channels, put the number of channels in the -c argument. Be advised the article is very informative and we hope it remains online as well as The Steve Litt Diagnostic Tools he provides there. Thanks Steve!We can test the default audio input device, or the only audio input device on a simplistic configuration{{:Arecord_alsa_audio_input_testing}} arecord -vvv -f dat /dev/nullWatch while the audio input levels are displayed as a percentage. We can specify an audio input device arecord -vvv --device="hw:1,0" -f dat /dev/null To figure out what audio input device is at hw: card,device use the following command arecord -lThe output look for "Card X" and on the same line "device X" to know the card,device combination to specify.Try this: (THIS WORKED) A viable work around to get rid of pulseaudio piece o crapTry this: (THIS WORKED) A viable work around to get rid of pulseaudio.,the following will start pulse audio, however, you should use systemctl instead if you are ubuntu/mint. See above on starting and stopping pulseaudio with systemctl.[[Category:Linux_Sound]]