I apologise if this has been asked (and the answer may be there in German, which I don’t read.
Is the rotary encoder addon only for justboom audio cards? The installation instructions here https://www.max2play.com/en/2016/12/rotary-encoder-ist-now-compatible-with-justboom-sound-cards/ seem to just be for justbooms.
I have a hifiberry amp clone. Is there a hardware volume knob implemented for this? https://www.inno-maker.com/product/hifi-amp-hat/
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