Looking for definitions for ALSA mixer controls for the DB410c


#1

Hello All,
I’m attempting to figure out what each mixer control does on the DB410c running the OpenEmbedded build IMM.LE.1.0 30400. Here is a listing of what I currently have defined in my ALSA mixer controls:

RX1 Digital Volume
RX2 Digital Volume
RX3 Digital Volume

TX1 Digital Volume
TX2 Digital Volume

TX1 HPF Cutoff
TX2 HPF Cutoff

TX1 HPF Switch
TX2 HPF Switch

RX1 DCB Cutoff
RX2 DCB Cutoff
RX3 DCB Cutoff

RX1 DCB Switch
RX2 DCB Switch
RX3 DCB Switch

RX1 Mute Switch
RX2 Mute Switch
RX3 Mute Switch

ADC1 Volume
ADC2 Volume
ADC3 Volume

RX1 MIX1 INP1
RX1 MIX1 INP2
RX1 MIX1 INP3

RX2 MIX1 INP1
RX2 MIX1 INP2
RX2 MIX1 INP3

RX3 MIX1 INP1
RX3 MIX1 INP2
RX3 MIX1 INP3

DEC1 MUX
DEC2 MUX

HPHL
HPHR

SPK DAC Switch

ADC2 MUX

RDAC2 MUX

I think that the RX1,2, and 3 values control the microphone volume, and the TX controls control various outputs, but I am unsure how to use the HPF and Mix parameters. Currently it seems that I’m overdriving my speakers quite a bit with TX1 and TX2 Digital Volume set to 19 in alsamixer. I think that having these clearly defined will allow me to further understand what exactly I am effecting when changing levels and switch parameters in the ALSA controls defined above.


#2

Hi Rob, page 16 and 17 of this doc might help.

The terms used in alsamixer correspond to the audio routing options.