Viewing a single comment thread. View all comments

Raephstel t1_j5s3d2q wrote

Reply to comment by Assumption-Academic in Does frequency response over 20 kHz matter if the upper hearing limit of the average adult human is 15–17 kHz? by sunjay140

I wonder how much digitally stored music has frequencies over 20k. It seems like a total waste of storage space.

3

lr_science t1_j5tki3g wrote

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.

1

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.

3