I am trying to test the audio IO for Hifiberry ADC+DAC Pro in a non-plugin context, which seems to be best done via RASPA.
Firstly, I wonder what are the equivalents to the configuration documentation Hifiberry provides here:
My understanding is that since nothing is going through alsa, this documentation is not relevant for Elk. How can I do the following?
- Select left and right inputs (built-in or J4 pins?)
- Control input gain for microphones
- Control output level
- Mic bias on/off (not sure if I will need this, but this is the only remaining parameter I think)
My other question concerns doing a simple loopback test to route input to output to check everything is working and levels are good.
Hifiberry recommends alsaloop here:
But again it will not be available. I see the equivalent here:
But it does not seem to come as a compiled executable on the platform OOB? What is the easiest way to compile/run it?
Finally I am wondering if there is some example code anywhere to using RASPA to build applications on Elk (rather than plug-ins which seem to have more examples).