Under my bed is a giant box of CDs that I've been meaning to rip for years. Some aren't on Spotify, some are, but not the right version and one is by an
The fancier rippers have testing and database for calibration of each model of optical drive. Basically, every one can have a different offset of a few dozen samples that you probably wouldn’t miss*, but if you compensate for that you can match checksums with other people ripping the same disc and know that you have an error-free rip.
*If you are ripping continuous DJ mixes with track markers, you also don’t want that gap of missing samples.
The fancier rippers have testing and database for calibration of each model of optical drive. Basically, every one can have a different offset of a few dozen samples that you probably wouldn’t miss*, but if you compensate for that you can match checksums with other people ripping the same disc and know that you have an error-free rip.
*If you are ripping continuous DJ mixes with track markers, you also don’t want that gap of missing samples.