Headphone audio

Hardware Nicla family Nicla Voice
1

Is it possible to use audio from a headphone output with Nicla Voice? I don't seem to be able to find something to convert it to PDM format. Apart from the internal microphone, are there other ways to feed analog or digital audio signals to Nicla Voice?

2

You can certainly use the ADC channels on the NRF53832 MCU to digitize line level analog signals. You will need to add a DC voltage offset as the ADC input accepts only positive voltages.

3

Thanks! I didn't realize that the ADC was able to sample at audio frequencies (I would need 16 MHz, which should be feasible)

4

Maybe 50kHz at most but certainly NOT 16MHz

5

Not with the nRF52832