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DS development > Microphone ADC

#61980 - notb4dinner - Sat Nov 26, 2005 4:45 am

Has anyone got any information on the ADC used to sample the microphone/headset? I'm mostly interested in the maximum sample rate (or conversion time) but any other info would be nice too (model numbers, datasheets etc). I've had a look around but there doesn't seem to be anything published, neimod's example and libnds both use a 16khz timer for sampling with no mention of why that particular rate was chosen.

Also, am I correct when assuming that the headset port is connected to the same ADC channel as the microphone?

#62853 - pt3r - Tue Dec 06, 2005 1:34 pm

I managed to go up to 44.1 khz sampling rate but the main problem is the 8 bit resolution. I'm still trying to figure out how to sample in 12 or 16 bit mode (if that is possible).