Finally, the Redbook standard is not a lossy compression algorithm. If
you think that it is, then you do not understand the term.

Losseless Compression: compress file, decompress file. Compare
original file to decompressed file and you find they're identical.

Lossy: Compress, decompress and compare them and you'll have 2
different files.

Then, according to your definition, CDA is lossy. If you compare the two
waveforms, you'll have different results.