It appears I may have been completely wrong. But if you hook up a multimeter to an RCA jack, i believe the current will fluctuate while the voltage will remain the same.
This is what happened to me, but it could have been many things if i am wrong (user error, bad connection... whatever).
Assuming standard hardware using RCA for audio fluctuate the current instead of the voltage, i would need more than an op amp to prepare the signal for an ADC (since ADCs read voltage not current)
This is what happened to me, but it could have been many things if i am wrong (user error, bad connection... whatever).
Assuming standard hardware using RCA for audio fluctuate the current instead of the voltage, i would need more than an op amp to prepare the signal for an ADC (since ADCs read voltage not current)