SlabPi

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SlabPi
Slabpi2.jpg
Owner Space
Status Infra
Hostname slabpi.dhcp.nurd.space
Location Near the amp
Tool No
Tool category

SlabPi

Slabpi2.jpg

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Near the amp

What

SlabPi is the replacement for Slab on a Raspberry Pi 4. It has been moved, because of downscaling. And recently got upgraded from a rpi3 to a rpi4, it has a DAC+ Hat for better audio quality.

Setup

Disabled/removed services

  • disabled unattented-upgrades
  • disabled wpa_supplicant
  • disabled accounts-daemon
  • disabled multipathd
  • ubuntu motd spam
  • removed snapd

Networking

It is hooked up with UTP. WLAN has been disabled.

==

DAC+

PiFi HIFI DAC+ for better audio quality.

Installation:

Edit /boot/config.txt

Disable the line

#dtparam=audio=on

add

dtoverlay=hifiberry-dacplus

MPD

Host: slabpi.dhcp.nurd.space

Port: 6600 (Technically 6005, see the mpd proxy service)

It is integrated with Home Assistant view on Jarvis.

HTTPD outputs:

  • port 6666 (8000:16:1) used by the VOIP system
  • port 7777 (44100:16:2) used by Audiophiles

PulseAudio

All pulseaudio changes need to be made in /etc/pulse/system.pa (default.pa isn't used)

Pulseaudio is running as a system-wide daemon, it's default sample rate is set to 48Khz and priority has been set to real time.

Icecast

There is an icecast server on port 8000. It's a direct feed from Pulseaudio so all sounds (Entrance themes, speak commands) will be heard on the stream.

Mount point(s):

  • /nurds (Pulseaudio)

MPD Control

For those not wanting to install a MPD client, there's a stand alone MPD web interface running called Mympd on port 80

Labelprinter implementation

Labelprinter is up and running. See Labelprinter.

Services

Entrance Themes

  • Location: /home/pi/scripts/theme_songs.py
  • Systemd-service: themesongs.service
  • Programmer: User:Melan

A script which plays a part of a song for each individual member entering the space. See Entrance themes.

MPD Icecast update

  • Location: /home/pi/scripts/mpd_icecast_update.py
  • Systemd-service: mpdicecastupdate.service
  • Programmer: User:Melan

Updates the current now playing song from MPD to the icecast mount /nurds

Vu Meter

  • Location: /opt/vu
  • Systemd-service: vu.service
  • Programmer: User:Zarya

https://gist.github.com/zarya/3d5447556296d6923bee232e4cc7fca1

LedFX

  • Location: /home/pi/.ledfx.sh
  • Systemd-service: ledfx.service

Pixelvloed FFT

  • Location: /opt/pulse-pixelvloed-fft
  • Systemd-service: fft.service
  • Programmer: User:Zarya

Pixelvloed waterfall

  • Location: /opt/pulse-pixelvloed-fft
  • Systemd-service: waterfall.service
  • Programmer: User:Zarya

hass-systemd-manager

A python tool for starting and stopping systemd services via mqtt using homeassistant (ledfx, waterfall etc)

Soundboard

  • Location: /home/pi/soundboard
  • Systemd-service: soundboard.service
  • Programmer: User:Melan

Allows samples to be triggered through MQTT, also handles the doorbell sound.

Als 't niet werkt, dan even inloggen op coherence en vanaf daar op vm 107 en daar proces 'python main.py' afschieten. Dat helpt soms na 1 of meer keer.

MPD Vol Proxy

  • Location: /home/pi/mpdVolProxy
  • Systemd-service: mpdvolproxy.service
  • Programmer: User:Melan

A small script that intercepts all the clients connecting to MPD on port 6000 and intercepts all setvol commands and instead delegates it to Pulseaudio, meaning that any volume command will not adjust MPD's output, but the output to the amplifier instead.

MPDTube

This project has its own wiki page, MPDTube

PulseControl

  • Location: /home/pi/pulseControl
  • Programmer: User:Melan

Part of the multi-room audio setup, it will ping if any of the defined hosts are up and once they are it will add their pulseaudio instance to the output.

 
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