lr_science t1_j5tki3g wrote
Reply to comment by Raephstel in Does frequency response over 20 kHz matter if the upper hearing limit of the average adult human is 15–17 kHz? by sunjay140
the technical limit is 1/2 the rate of the audio file in an uncompressed file. thus, a wav with 44.1 kHz can store frequency information of up to 22.05 kHz. You may thus argue that about 10% is wasted in those files.
AnOldMoth t1_j5toxr9 wrote
It's not wasted, it's used for the low-pass filter that is a crucial part off the digital to analog conversion process. If you don't use a low-pass, ultrasonic information left behind will ripple back into the audible band and distort it.
lr_science t1_j5uqkhh wrote
interesting, thanks!
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