Forums - Audio Mixer_paths.xml

Hi.
I wonder if there is anyone who tried mixer_paths.xml to change sound input paths and output paths with a streaming music.

Following is my case.

Phone A <----> Phone B <------ Phone C
Above A, B has a existing phone call going on. And phone C is streaming music to Phone B, and Phone A can hear the music on his end. It is not necessary to play music on Phone B's side, the ultimate goal here is to transfer music from phone C to Phone A.
I tried to chang mixer_paths.xml, like following.

<path name="voice-speaker">
<path name="speaker-lite" />
<ctl name="SLIM RX1 MUX" value="AIF1_PB" />
<ctl name="SLIM RX2 MUX" value="AIF1_PB" />
<ctl name="SLIM_0_RX Channels" value="Two" />
<ctl name="RX2 MIX1 INP1" value="RX1" />
<ctl name="RX3 MIX1 INP1" value="RX2" />
<ctl name="RDAC4 MUX" value="DEM2" />
<ctl name="RDAC5 MUX" value="DEM4" />
<ctl name="LINEOUT1 Volume" value="14" />
<ctl name="LINEOUT2 Volume" value="14" />
</path>

but, it the sound from Phone C still doesn't go to Phone A. I would appreciate if someone can give me a pointer. As a matter of fact, I am not sure what <ctl name="SLIM_0_RX Channels" value="Two" /> or <ctl name="RX2 MIX1 INP1" value="RX1" /> or <ctl name="RDAC4 MUX" value="DEM2" /> means that much.

If this is not the right place please redirect me to a right place.
Thank you.

Theo