linux audio: added standalone easyeffects/pipewire/pulseaudio with links to preset

wiki/linux/audio.md

@@ -2,36 +2,24 @@
 
 Audio is an important point in a linux desktop environment
 
-## Pulseaudio
+## Sound Server
 
-[Pulseaudio](https://www.freedesktop.org/wiki/Software/PulseAudio) is the go-to
-audio server program for linux distributions.
+A sound server is software that manages use and access of audio devices.
+The following is a list of available sound servers.
 
-## Noise cancellation
-
-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.
-
-## Pipewire
+- [PulseAudio](./pulseaudio.md) is the go-to sound server program used for
+  linux.
+- [Pipewire](./pipewire.md) is a modern graph based sound server.
 
-[Pipewire](https://pipewire.org) is a graph based processing engine for
-`pulseaudio` and `JACK`.
-It makes improvements for the input and output handling.
-
-### Installation
-
-If the current audio server program running is `pulseaudio`, you can just
-install `pipewire-pulse` (on Arch-based distros or according packages on other
-distros) and pipewire is running.
-Make sure to restart to be sure everything is running correctly.
+## Noise cancellation
 
-### 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.
 
-Noise cancellation can be easily achieved in `pipewire`-style by installing
-[easyeffects](https://github.com/wwmm/easyeffects).
-Make sure to check the box `Process all Inputs` and `Process all Outputs` to
-route everything through `easyeffects`.
-Make log out of your system afterwards.
-To enable noise cancellation navigate `Inputs` and click `Plugins`.
-After that click `Add Plugin` and select `Noise Reduction`.
+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.

wiki/linux/easyeffects.md

@@ -0,0 +1,44 @@
+# Easyeffects
+
+[Easyeffects](https://github.com/wwmm/easyeffects) is a free and open-source
+GUI-software for applying sound effects and filters on input and output audio
+streams.
+Easyeffects uses [Pipewire](./pipewire.md) as
+[sound server](/wiki/linux/audio.md#sound-server).
+
+## Installation
+
+Easyeffects can be installed in most distributions by installing the
+`easyeffects` plugin.
+An installation via [Flatpak](./flatpak.md) is also possible.
+
+## Usage
+
+Easyeffects can apply `Effects` to input and output sound.
+
+### Noise cancellation
+
+Noise cancellation can be achieved by installing
+Easyeffects.
+Make sure to check the box `Process all Inputs` and `Process all Outputs` to
+route everything through `easyeffects`.
+Make log out of your system afterwards.
+To enable noise cancellation navigate `Inputs` and click `Plugins`.
+After that click `Add Plugin` and select `Noise Reduction`.
+
+### Presets
+
+Presets can be created by selecting `Presets`, setting the name and clicking the
+`+` to save it.
+It is then displayed in the list below from where it can be loaded or deleted.
+Presets are saved in the directory `~/.config/easyeffects/input` and
+`~/.config/easyeffects/output`.
+
+#### Recommended Presets
+
+The following is a list of presets that have been tested and only need slight
+configuration to adjust them to the specific system.
+
+- [tiyns voice input preset](https://github.com/tiyn/dotfiles/blob/master/.config/easyeffects/input/voice.json)
+  is a list of different effects to achieve an enhanced quality of microphone
+  sound for speach.

wiki/linux/pipewire.md

@@ -0,0 +1,23 @@
+# Pipewire
+
+[Pipewire](https://pipewire.org) is a graph based
+[sound server](/wiki/linux/audio.md#sound-server).
+
+## Installation
+
+For clients that use the [PulseAudio](/wiki/linux/pulseaudio.md) API
+`pipewire-pulse` (on Arch-based distros or according
+packages on other distros) can be installed.
+It will automatically remove unneeded and conflicting PulseAudio packages.
+Additionally `pipewire-alsa` and `pipewire-jack` for JACK and Alsa clients are
+available.
+Make sure to restart to be sure everything is running correctly.
+
+## Sound processing
+
+For simple sound processing in the form of volume adjustment as well as setting
+the default input and output devices `pavucontrol` can be used as a simple
+mixer.
+For further sound processing the easiest way to do so is using
+[easyeffects](/wiki/linux/easyeffects.md) which features a wide range of effects
+to apply to sound streams including noise reduction.

wiki/linux/pulseaudio.md

@@ -0,0 +1,11 @@
+# PulseAudio
+
+[PulseAudio](https://www.freedesktop.org/wiki/Software/PulseAudio) is a
+[sound server](/wiki/linux/audio.md#sound-server) distributed by the
+[freedesktop.org](https://www.freedesktop.org/wiki/Software/PulseAudio) project.
+
+## Sound Processing
+
+For simple sound processing in the form of volume adjustment as well as setting
+the default input and output devices `pavucontrol` can be used as a simple
+mixer.