[How to do instruction] Loudness compensated volume control with CamillaDSP

[roderickvd]

Pretty cool :-) A loudness compensation feature for MPD and all the renderers is quite sophisticated and very desirable since Low Level Listening (LLL) is a common usage scenario.

Thanks! Certainly scratches my own itch and that of others too I imagine. I have always loudness correction that for its bass boost. Audyssey EQ pulls off the same trick, although a bit more sophisticated.

I also thought about making a tight integration with moOde and its UI. Of course this would be a much larger effort. What do you think?

So basically we configure MPD and the renderers to use the ALSA Dummy device as mixer and then a daemon monitors it and proxies volume changes to Camilla, right?

Exactly.

It could even be easier, but I would need your expertise with Alsa configuration files. Would it be possible to slave the dummy mixer control to the output device? In this case you could do it system-wide without touching any of the renderers.

Is dummvol2cdsp in a Git repo?

I will make it so tonight.

If it helps I could do any or more of the following:
- make it into a daemon
- have it accept command line options or environment variables
- parse variables from a configuration file

Let me know.