Re:Audio Processing for Dummies
by layoutIfNeeded on Sunday November 10, 2019 @05:50AM
(#21497461)
>Is an audio stream really just a bunch of samples of volume?
Yes.
> I had always assumed you needed to record different wavelengths of sound to capture different pitches
Why? Look at a mono vinyl record. It has a single groove, which is the soundwave carved into the vinyl. Digital audio is the same, except you store a digital image of the groove.
>Is my mental model completely wrong?
Yes.
>How do you get such variety in sound just from recording the volume?
Yes.
> I had always assumed you needed to record different wavelengths of sound to capture different pitches
Why? Look at a mono vinyl record. It has a single groove, which is the soundwave carved into the vinyl. Digital audio is the same, except you store a digital image of the groove.
>Is my mental model completely wrong?
Yes.
>How do you get such variety in sound just from recording the volume?
By recording the volume 44100 times per second.