Have been using Volumio on my raspberry 3 + Hifiberry DAC+ quite happily… However, screwed down onto a piece of wood together with my Gainclone amplifier…
So it’s time to add a nice housing… To which i would like to add a couple of those old school analog VU meters they sell on aliexpress/ebay etc.
I would like those VU meters to respond to the music on a fixed volume level, separate from the actual DAC output that is fed into my amplifier (controlled by the volume setting in volumio).
I dont realy care about the quality of that output, it’s just for the gauges so i figured that maybe i can connect a 2nd cheap DAC to the I2S output stream used for the hifiberry and just let it decode to a fixed volume… I am however unsure what kind of signals control the volume of the hifiberry dac ?
is this done through i2c or is it embedded into the i2s stream ?