How to adjust the gain of HifiBerry DAC+ADC Pro in Python?


According to the HifiBerry documentation, the input gain can be adjusted from -12dB to +32dB in 0.5dB steps. I was able to test that in Alsamixer.

However, Alsa can increase the gain up to +40dB which I don't understand how. Hifi uses PCM1863, which has a programmable gain of -12dB to +32dB. I don't know how Hifi can increase the gain more than that.

My main question is though, how I can program the gain in Python (or C++).

Thank you





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