There’s a technical loss going from an analog to digital format just because of the fact that it’s a sampling of the sound wave. Similar to why Pi has no end and you could never calculate the exact measure of a circle, it can get as close as necessary for human consumption, but will never be the pure wave form. Thing is that even an analog format like vinyl isn’t a guaranteed perfect recreation just because of micro changes created any number of things that could cause a cutting head to be just a fraction out of line with the original.

What’s absurd about the whole argument is this notion that if you take a bit perfect copy of something and duplicate it that somehow inherently something is lost. Somewhat interesting way to consider it, we as living beings do that whole code duplication thing countless times a day just by cellular division as part of living, and for the most part it works without a hitch even without the error correcting code that computer systems have. With digital replication at least it’s simple enough to say that sequence A equals sequence B, therefore they are identical.

Pretty sure I still have some media for mine here even. Software might be a hunt to find where it got stored at though.

Assuming there’s no conversion I might have added in. Yes if you change from wav to mp3 or similar there will be changes. A disk image copy, or even placing a digital file onto a disk doesn’t alter the content regardless of burned or pressed, only the method of storage. A hash of the file should return the same regardless assuming no errors in the writing.

A CD, burned or pressed, will be a replication of the source as presented in a digital format. If you have to covert true analog sound to digital then the sampling rate will have some technical loss, though not perceivable to most humans.

A digital to digital copy will be a 1 to 1 replication of the data, there’s no expectation of loss other than perhaps physical error of the drive, which even pressed disks can suffer from if the stamper is worn.

Edit Source: literally worked in a optical media replication plant back when DVD was still a fairly new thing. It starts off making a glass master disk in a clean room. From that, a positive metal stamper plate is created for production runs, tested periodically to verify the output still matches the master dataset. Once the metal stamper is worn to the point of causing errors it is replaced.

Burned disks are functionally identical to pressed disks in operation but work by darkening bits in the media layer. They degrade easier because of the photo sensitivity needed to let the laser change their state.

Well now I’m gonna burn one of my RW disks just to make this wrong.