Long before digital sampling was affordable for everyone, A.K.Klosowski invented his Kassetteninstrument, a custom-made music apparatus consisting of eight SONY-Walkmen combined with a mute/demute mechanism. The outputs of the instrument could be controlled both by hand and by an automatic trigger module. In addition, a drum computer and some effect machines were fed into the circuit. This technique allowed for very intuitive and simultaneous control over the analogue tape sources.
An LP of Klosowski's solo work from the years 1982-84 has been released on Gagarin Records in Nov 2016.
Check out https://gagarinrecords.bandcamp.com/album/a-k-klosowski-plays-the-kassetteninstrument