Now that we have a point along the x-axis, the computer must assign a value to describe its position on the y-axis of the wave.
This is called sample resolution, and is measured in bits. An 8-bit sample resolution will allow for a possible 256 different positions along the y-axis.
This really isn't enough information to reproduce high quality sound. Therefore modern digital sound devices typically have a 24-bit sample resolution, allowing for 16,777,216 variants in amplitude.
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