Comment by skydhash
8 hours ago
I know that with oscilloscopes, it’s recommended to use 5x instead of nuquist 2x of the highest frequency you want to use., but the most reasonable argument I’ve heard for higher than 48kHz sampling is digital audio effects.
But for the end result 48kHz is more than necessary. I can’t even hear any frequency above 17kHz.
> I know that with oscilloscopes, it’s recommended to use 5x instead of nuquist 2x of the highest frequency you want to use.
For capturing analog signals, 2.5X is enough headroom.
The 5X recommendation is probably for digital signals where the frequency refers to the baud rate, not the highest frequency coming through. A fast switching digital signal will have components with higher bandwidth than the fundamental. Using a higher multiple of samples (assuming the bandwidth is there) will let you see the shape of the waveform and rise and fall times better.
Yes, bit depth headroom is very useful for audio production to avoid aliasing. Pro DAWs support 96KHz.
yeah for real time signals higher frequency makes sense (very briefly before you fft and kill the high frequencies), but for stored signals nyquist is king.