Why is FFT values range from -40 to +40?


#1

Im trying to understand the reason behind the FFT values across the 129 being in the range -40 to +40. On the developer site on the osc path page, it says that the range is from -4 to 2. But in the raw data it is different. Can you people shed some light on it?

thanks.


#2

Ah, good catch chhetri!

Looks like the documentation is out of date in that regard. The units you’re seeing are correct, the were changed from bels to decibels some time ago.

Thanks for the heads up.