BACK IN STOCK! The current Polwechsel quartet of Werner Dafeldecker, Michael Moser, Martin Brandlmayr and Burkhard Beins — merging improvisation and contemporary forms for outstandingly paced and conceptualized performance — are joined by luminaries John Butcher, Klaus Lang, Magda Mayas, Andrea Neumann and Peter Ablinger, released in a deluxe 4-LP box set with a 32-page booklet.

Austrian composer Peter Ablinger wrote this study, which is not intended for live performance, using a violin performing a slow glissando over one octave, here performed by violinist Johnny Chang, the recording then composed in the studio as a proportion canon, virtually layering 16 violins in a study displaying the harmonic interactions of that single glissando.