Does Dragonboard410 C has analog pins (for audio)?
Looking at the document you linked, you can find this information on section 7 Analog Expansion Connector.Hope it is what you are looking for.Jean-Marc
Of course the 410c has analog Audio inputs and outputs. There is an app note on using the connector https://developer.qualcomm.com/download/db410c/stereo-connector-and-audio-routing-application-note.pdf. I have updated the app note to fix one error, and to make everything a little clearer. I have completed all the document updates, but the updates are not yet posted. I hope they will get posted this week.
Full Disclosure: I am an employee of Qualcomm Canada, any opinions expressed in this or any other post may not reflect the opinions of my employer.