As long as these phones have a 3.5’ headphone jack, you have 1 channel 8-20 kHz ... | Hacker News

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		beagle3 on Nov 11, 2018 \| parent \| context \| favorite \| on: C-Sky: A $6 Linux dev board with HDMI and USB As long as these phones have a 3.5’ headphone jack, you have 1 channel 8-20 kHz ADC and two channel 8-48 kHZ DAC. That’s not I2C or SPI but it is helpful and useful for many applications. The people at Square (payment app) can tell you all about it.

markrages on Nov 11, 2018 [–]

Audio DAC and ADC do not measure or output DC, which makes them useless for many applications.

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