In Germany they still produce cassette tapes :). Quality control is done
with Studer tape recorders and RFT monitors. Some years ago I got two
RFT monitors for less than 50,- € at Ebay :). Seen on German television,
today at 18:31 kabel eins. I suspect the Studer studio tape recorders
are un-payable and impossible to maintain, so I suspect there will be no
long future for this technology. The same factory does produce records
too :).
The cassette tapes they produce are audio dramas, they didn't mention
music.
Regards,
Ralf