Dear matse,
Welcome!
I suggest you go Bob's first plan to go with the arduino writing changes to DSP's parameter RAM via I2C, since this will give u unlimited control in the long run.
as a detailed example u can try to store pre-calculated parameters exported from the capture window to the arduino and write them to the dsp:
code ADI_REG_TYPE MUTE_VALUE_ON[4] = {0x00, 0x80, 0x00, 0x00};
code ADI_REG_TYPE MUTE_VALUE_OFF[4] = {0x00, 0x00, 0x00, 0x00};
note: u can safeload-write it by padding additional zeros making the whole data 5 bytes, i.g. (0x00, 0x00, 0x80, 0x00, 0x00)
void SIGMA_WRITE_REGISTER_BLOCK(uchar devAddress, uint param_address, uint length, ADI_REG_TYPE *dVal)
{
// START I2C
// Send Device ID
// mask,shift by one byte, and send upper address byte
// mask and send lower address byte
// send data byte by byte
// Send ACK bit on I2C bus
// STOP I2C
}
void mute_dsp(){
SIGMA_WRITE_REGISTER_BLOCK(0x68, 0x0000, 4, MUTE_VALUE_OFF)
}
I've tried this using 8051 uC, but im pretty sure arduino has it s own I2C library counterpart.
Then, use an external Arduino GPIO pin (push button, IR remote) as interrupt, for example, and call the mute_dsp() function to mute the dsp and make similar function as to unmute it.
As stated earlier, u can have unlimited option to vary the dsp parameters on the fly, like filter coeffs, volume control, phase, parametric EQs, compressors, etc...by updating it's parameters via I2C!
Good Luck!
Best regards,
Dan