# Linux

## Low Latency Kernel

```sh
echo "@audio - rtprio 95" >> /etc/security/limits.conf
echo "@audio - memlock unlimited" >> /etc/security/limits.conf
sudo usermod -a -G audio ste
```

```sh
sudo apt install linux-lowlatency
restart
uname -a
```

## Pipewire

### Install
```
sudo add-apt-repository ppa:pipewire-debian/pipewire-upstream
sudo apt update
sudo apt install \
pipewire \
gstreamer1.0-pipewire \
libpipewire-0.3-{0,dev,modules} \
libspa-0.2-{bluetooth,dev,jack,modules} \
pipewire{,-{audio-client-libraries,bin,media-session,pulse,tests}}
```

**QT Interface**

```sh
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
flatpak install flathub org.rncbc.qpwgraph
```


**GTK Interface**

https://gitlab.freedesktop.org/pipewire/helvum

```sh
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
flatpak install org.gnome.{Platform,Sdk}//45 org.freedesktop.Sdk.Extension.rust-stable//23.08 org.freedesktop.Sdk.Extension.llvm16//23.08
flatpak-builder --install flatpak-build/ build-aux/org.pipewire.Helvum.json
flatpak run org.pipewire.Helvum
```




### Setup
```sh
systemctl --user daemon-reload
systemctl --user --now disable pulseaudio.service pulseaudio.socket
systemctl --user mask pulseaudio
systemctl --user --now enable pipewire pipewire-pulse
pactl info
```


### WirePlumber 

```sh
sudo apt install wireplumber pipewire-media-session-

# For ALSA clients to be configured to output via PipeWire,
sudo cp /usr/share/doc/pipewire/examples/alsa.conf.d/99-pipewire-default.conf /etc/alsa/conf.d/

# For JACK clien
sudo cp /usr/share/doc/pipewire/examples/ld.so.conf.d/pipewire-jack-*.conf /etc/ld.so.conf.d/

# For Bluetooth, just remove the pulseaudio-module-bluetooth
sudo apt remove pulseaudio-module-bluetooth

# ?
sudo ldconfig

# enable the new media session
systemctl --user --now enable wireplumber.service

# Verify
pactl info

# Status
wpctl status
wpctl inspect 48
```

### Configure
`/etc/pipewire/pipewire.conf`

```
default.clock.min-quantum   = 8
default.clock.max-quantum   = 8
default.clock.quantum-limit = 8
```

`systemctl --user restart pipewire.service`


https://github.com/robbert-vdh/dotfiles#pipewire

### 1. ALSA period size and the number of periods.

Default: 64 frames/period

`~/.config/wireplumber/main.lua.d/90-alsa-config.lua`

`systemctl --user restart wireplumber`

### 2. Sample rate 48000

Default: 44100

`~/.config/pipewire/pipewire.conf`


### 3. The quantum size

Default: 512 samples

`pw-metadata -n settings 0 clock.force-quantum N`

### 4. PipeWire always replace JACK.

`systemctl --user start pipewire-pulse.service pipewire-pulse.socket`


### restart

`systemctl --user restart pipewire pipewire-pulse wireplumber`



https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Config-PipeWire#runtime-settings

```sh
pw-metadata -n settings
pw-metadata -n settings 0 clock.force-rate 48000
pw-metadata -n settings 0 clock.force-quantum 64
```

# DAW

## Reaper

https://www.reaper.fm/download.php

**Reaper Themes**

https://stash.reaper.fm/tag/Themes


# Sampler

## Decent Sampler

https://www.decentsamples.com/product/decent-sampler-plugin/

**Presets**

https://www.pianobook.co.uk/sampler/decent-sampler/



https://pulse.audio/

https://pulsedownloader.com/


# Instrument

## Vital

**Presets**


## Surge XT
https://surge-synthesizer.github.io/

**Presets**

https://www.kvraudio.com/product/surge-xt-by-surge-synth-team/downloads

https://presetshare.com/presets?instrument=7&page=5

## Cardinal
https://github.com/DISTRHO/Cardinal



# Plugins
https://www.audiopluginsforfree.com/

## Fire
https://github.com/jerryuhoo/Fire

## Autotune
https://x42-plugins.com/x42/x42-autotune

## LSP (Linux Studio Plugins)
https://lsp-plug.in