It is currently designed with 4 microphone inputs and 2 line outputs.
DSP CHIP AD1940 (4 mic inputs) + (1 line output feedback input) = 5 total.
I'm testing with SIGMASTUDIO and it's not working.
1. IN/OUT MUTE when there is no microphone input
2. Automatically remove audio feedback
I'm planning on designing like this, so please help.