FFT and PEAK detection resolution?

Im curious, at what bit resolution do the PEAK and FFT functions operate at? Is it at the standard 10bit resolution?

I know the output from PEAK and FFT are from 0 to 1. To what decimal place will these measure down to?

For example, doing an analog read on a pin, is by default set to 10bit. But can be increased. Is it also possible to increase the resolution of the PEAK and FFT readings?


Thanks for the insight!

16 bits. Internally it's all fixed at 16 bits.

For FFT, the algorithm involves small round-off errors, on the scale of 1-2 bits.

Thank you Paul!

So what sort of precision is there in the measurement that is output from them?

I know it goes from 0 to 1. But is that for example, 0.001 . As in 1/1000th?

Thanks!

dsparks said:

So what sort of precision is there in the measurement that is output from them?

Click to expand...

Approx 1/32768th (the unsigned portion of an int16_t).

Thats a nice precision!

Thank you!