====== Audio-Pis ======

---- dataentry project ----
name : audio pi
project-owner : mazdermind
git-url : 
project-description : Audio streaming pi
project-owner : 
project-member : 
project-status : running
----

{{ :hardware:audio-pis.jpg?400}}

The Audio-Pis are Raspberry-Pis with a Soundcard on top, accompanied with a Set of often used Audio-Adapters. They are used to stream Music from Lounges/Discos/Clubs via Wifi or Ethernet.
They are using the [[http://www.audioinjector.net/rpi-hat|Audio Injector Soundcard by FlatmaxStudios]].

===== Checklist =====

**[[hardware:audio-pis:checklist|Audio-PI Checklist]]**

===== Parts-List =====

 * [[https://www.amazon.de/gp/product/B00ILK6DMA/|Alu-Heatsink for RPi3]]
 * [[https://www.amazon.de/gp/product/B013UDL5V6/|SanDisk Ultra microSDHC 16GB]]
 * [[https://www.amazon.de/gp/product/B01DP8O5A4/|Official Raspberry-Pi Plugpack]]
 * [[https://www.amazon.de/gp/product/B01CD5VC92/|Raspberry Pi 3]]
 * [[https://www.amazon.de/gp/product/B005BP91EK/|Mesh-Bag]]
 * [[https://www.amazon.co.uk/gp/product/B01HBC8CJ0/|RPi Soundcard "Audio Injector" by FlatmaxStudios]]
 * [[https://www.thomann.de/de/cordial_cfu_3_cc.htm|3m Stereo Cinch male --> Cinch male Cable]]
 * [[https://www.thomann.de/de/the_sssnake_1820_adapter.htm|6.3cm Mono Klinke male --> Cinch female Adapter]] - 2x
 * [[https://www.thomann.de/de/the_sssnake_1860_y-adapter.htm|6.3cm Mono Klinke male --> 2x Cinch female Y-Adapter]]
 * [[https://www.thomann.de/de/the_sssnake_1861_yadapter.htm|6.3cm Stereo Klinke male --> 2x Cinch female Y-Adapter]]
 * [[https://www.thomann.de/de/pro_snake_tpy_2003_kcc.htm|3.5cm Stereo-Miniklinke male --> 2x Cinch female Y-Adapter]] 

===== 3D Printed Cases =====

{{:hardware:audio-pis-case-beta.jpg?400 }}

We are in the Process of designing and printing Cases for the Audio-Pis including the Soundcards. Here is a Rendering of the Beta, we'll tweet when the Case-Design is finished and tested and it will be publish here.

===== Software =====

The Configuration of the Audio-Pis is managed from our [[https://github.com/voc/cm|Config-Management]], but basicly it runs an [[https://github.com/voc/cm/blob/5324e06/ansible/roles/audio-pi/templates/audio-ingest.sh.j2|ffmpeg-Command]] reading from alsa, encoding as Opus and pushing to our Icecast-Server. A second transcoding-ffmpeg, running on some server, is then generating the secondary mp3-stream from the primary opus stream.


===== AV Meter =====

They got a visual audio volume meter mounted which can be switched on/off and switch between input and loopback output sound.

https://c3voc.de/wiki/hardware:audio-pis:av-meter

{{:hardware:audio-pi-vumeter-schalter.jpg?200|}}