and plays with more tracks from the club's master CDs (ie the ones I don't already own myself anyway!) to salvage, repurpose and archive them to them website.

some of the CDs are very worn (scratches and pock-marks in the silvering) from being used directly by careless people (rather than copied onto mixer CDs) and/or stored badly.

he seems to remember that some music services used to let you replace your digital copy of a track with their perfect one.

been searching for the next couple of CDs on the list to process for archiving and found they weren't there in the storage boxes! Even freakier was the appearance of 2 copies of another CD.

it's possible one of the people previously storing the boxes may have removed the missing stuff and accidentally put their own copy of the duplicate. Otherwise the CDs are eating each other and breeding or mutating.

it might also be possible for the missing CDs to have been left behind at the venue which is currently full of scaffolding.

they ran into a CD here which may be impossible to replace (does it rip successfully or not, it won't play). It was a "home burnt" CD which had hand drawn label glued on. Clearly affecting the CD underneath.