Volume and mute control - schematic and softconfig,

Hi everyone, 

I'm working on ADSP -SC589 ez board with mic as 1 input source and a speaker as 1 output source. I've attached the setup, schematic and softconfig.c below. 

1) Please check if IODIRB direction is correct.

2) In the schematic should i connect linear0 to mute block or linear3 to mute block? Also, Should the output be channel0 (CH0) or channel7(CH7)?