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+---
+author: Alvie Rahman
+date: \today
+title: Pulseaudio
+tags: [ pulseaudio, linux, audio, mixing, microphone, sink ]
+---
+
+# Collect and Mix Sound Input From Different Sources {#paMixer}
+
+## Create Mixer {#createMixer}
+
+From <https://askubuntu.com/a/870596>:
+
+> [...]
+>
+>     pactl load-module module-null-sink sink_name=inputs
+>
+> [...] please repeat this for [every] input you want to mix [...]
+>
+>     pactl load-module module-loopback sink=inputs
+>
+> Now you will have to connect this new "loopback" channels to the device you intend to record from.
+> You can do this using "pavucontrol" (install it if missing), open the "Recording" tab, select
+> "Virtual Streams" from the bottom selector and then make sure you connect a different input to
+> each different loopback.
+> [...]
+
+The number returned by each command is the module id.
+You may want to keep it if you want to [delete them individually](#destroyMixerSpecific).
+
+## Destroy Mixer {#destroyMixer}
+
+### Destroy _all_ Loopback and Null-Sink Modules {#destroyMixerAll}
+
+From <https://www.pclinuxos.com/forum/index.php/topic,119695.msg1159936.html#msg1159936>:
+
+>
+>     pactl unload-module module-loopback
+>     pactl unload-module module-null-sink
+>
+
+This will unload _all_ loopback and null-sink modules.
+
+### Destroy Specific Modules {#destsroyMixerSpecific}
+
+>
+>     pactl unload-module <module number>
+>