HDSP_ADGain0      204 sound/pci/rme9652/hdsp.c #define HDSP_ADGainMask       (HDSP_ADGain0|HDSP_ADGain1)
HDSP_ADGain0      206 sound/pci/rme9652/hdsp.c #define HDSP_ADGainPlus4dBu   (HDSP_ADGain0)