Hi, I’ve just purchased an APM2 board to provide DSP functions between a preamp and power amp going in an active loudspeaker. I’ve worked on several projects before with SigmaStudio and Sure / Dayton ADAU1701 based boards before with success however the APM2 doesn’t seem to be behaving as I would expect. Picture shows test setup
With power connected I hear the input signal on the speaker from AD0 connection (also from AD1). I expected this as the board ships with a program already loaded, howeverPOTS d the on’t do anything which suggests the default program on the APM2 is not working.
With power off and the ICP programmer disconnected I still hear audio through AD0 connection – even though the board is not powered up. I wouldn't expect to hear anything as the unit isn't powered. (The audio is actually louder when not powered)
When programming Sigma studio indicates correct download of program to the board and the LED flashes on the AMP2 - however there no change in function.
Anyone know what's going on here?
With power connected I hear the input signal on the speaker from AD0 connection (also from AD1). I expected this as the board ships with a program already loaded, howeverPOTS d the on’t do anything which suggests the default program on the APM2 is not working.
With power off and the ICP programmer disconnected I still hear audio through AD0 connection – even though the board is not powered up. I wouldn't expect to hear anything as the unit isn't powered. (The audio is actually louder when not powered)
When programming Sigma studio indicates correct download of program to the board and the LED flashes on the AMP2 - however there no change in function.
Anyone know what's going on here?