Corrected various typographic errors

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wiki/linux/audio_(linux).md

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+# Audio
+
+Audio is an important point in a linux desktop environment
+For non-Linux specific audio software navigate to the corresponding
+[wiki article](/wiki/audio_%28general%29.md).
+
+## Sound Server
+
+A sound server is software that manages use and access of audio devices.
+The following is a list of available sound servers.
+
+- [PulseAudio](/wiki/linux/pulseaudio.md) is the go-to sound server program used for
+    linux.
+- [Pipewire](/wiki/linux/pipewire.md) is a modern graph based sound server.
+
+## Noise cancellation
+
+Removing noise can be achieved by using
+sound processing software options for [sound server](#sound-server).
+An example for this is the noise reduction included in
+[easyeffects](/wiki/linux/easyeffects.md#noise-cancellation) for Pipewire.
+
+As an alternative software explicitly made for the reduction of noise can be
+installed.
+Belonging to the latter option noise cancellation can be easily achieved by
+installing [Noisetorch](https://github.com/lawl/NoiseTorch).
+After the installation modify the `Voice Activation Threshhold` to your needs.
+
+## Control Audio from Command Line/by Hotkey
+
+Audio from many different clients can be controlled (started, stopped, skipped)
+using the command line with [PlayerCTL](/wiki/linux/playerctl.md).
+With additional software it can also be used to control audio/music by pressing
+hotkeys.
+This is explained in the
+[PlayerCTL entry](/wiki/linux/playerctl.md#using-hotkeys).
+
+## Sound Board
+
+There are various available software solutions for sound boards.
+One option is [CasterSoundboard](https://github.com/JupiterBroadcasting/CasterSoundboard).
+Another is the cue player
+[Linux Show Player](https://linux-show-player-users.readthedocs.io/en/latest/index.html) which
+should be installed using [flatpak](/wiki/linux/flatpak.md) (`org.linuxshowplayer.LinuxShowPlayer`).