====== Audio over IP ======

http://www.pogo.org.uk/~mark/trx/

  * wget http://www.pogo.org.uk/~mark/trx/releases/trx-0.5.tar.gz
  * sudo apt-get update
  * sudo apt-get install libasound2-dev (gets alsa/asoundlib.h)
  * <del>sudo apt-get install opus-tools</del> (trying to get opus/opus.h)
  * <del>sudo apt-get install ffmpeg</del> (trying to get opus/opus.h)
  * sudo apt-get install -y libopus-dev (get opus/opus.h)
  * sudo apt-get install libortp-dev (get ortp/ortp.h)
  * make

==== Troubleshooting ====

On transmit side, kept getting directory-not-found errors. 

This helped:

https://github.com/eugenehp/trx/issues/3

<code bash>
try something like

sudo ./tx -d plughw:2,0 -h 239.0.0.1
</code>

I added a USB Logitech Audio "card" on the transmit side. Now it doesn't error. Receive side shows errors.

  * Try ''cat /proc/asound/devices'' to see the inserted Logitech Audio
  * Try ''aplay -l'' to see ALSA output devices.
  * Try ''arecord -l'' to see ALSA input devices.

[4/17/2020]

<code bash>
omxplayer -o local example.mp3
</code>