And, like it or not, that's compression.

My response was to this post:

I heard it was somewhat based on how much data could be fit on the CD and at what type of compression.

I realize that from a semantic standpoint, you could argue that different sampling frequencies can be considered "compression", even though that word isn't used (as far as I know) to describe the different data rates resulting from different sampling frequencies.

So I'm assuming that you mean one of the factors they considered when deciding upon the CD format was the sampling frequency and the sampling resolution, because those would also affect the amount of sound you could fit on a disc. All right, I'll give you that.

But my response was based on the current definition of compression as being short for "data compression", and I just wanted to make the point that the data rate of an audio compact disc is fixed, and that there's no "type of compression" on an audio compact disk since it is raw, uncompressed, unencrypted wave sample data.