====== AUDIO MULTICHANNEL ======

Raspberry pi :
  * https://www.hifiberry.com/blog/dsp2x4-sneek-peak/
  * https://www.audioinjector.net/rpi-octo-hat
  * http://www.suptronics.com/miniPCkits/x6000-7.1ch.html
  * https://support.hifiberry.com/hc/en-us/community/posts/360004445918-More-input-and-output-channels?page=2#comments
  * http://forum.audioinjector.net/viewtopic.php@t=4916.html
  * https://forums.raspberrypi.com/viewtopic.php?t=35243

Teensy :
  * https://hackaday.io/project/2984-teensy-audio-library/log/57537-tdm-support-for-many-channel-audio-io

FPGA :
  * https://gitlab.com/rtlaudiolab/fpga_audio_processor