DIGITAL_MIXER_IN0
DIGITAL_MIXER_IN0 + FM_MIXER, 0xff
DIGITAL_MIXER_IN0 + MODEM_MIXER, 0xff
INTER0_IN + I2S_INTDEC, DIGITAL_MIXER_IN0 + I2S_MIXER, 0xff
DIGITAL_MIXER_IN0, 0xff
INTER0_IN, DIGITAL_MIXER_IN0, 0xff
INTERM0_IN, DIGITAL_MIXER_IN0, 0xff
*mixer = sink - DIGITAL_MIXER_IN0;