IR Controller

IR Sender

The first hit when searching for IR on Linux is Liirc. Yet Liirrc did not work with the remote for my RME ADI2 FS DAC that i needed to control.
Luckily i found piir.

PiIR is a client program for pigpio, the excellent hardware-timed GPIO library.
To install follow instructions given here. 

Recording a signal is as easy as 

piir record --gpio 18 --file rme.json

T send a signal add the Key to send

piir play --gpio 22 --file rme.json power-on