J. S. Bach: Musical Offering from Supraphon (SUA 10072). 1960's classical album performed by Ars Rediviva Ensemble that includes the following: Musical Offering A1 Ricercar (A 3) A2 Canon Perpetuus Super Thema Regium A3 Canon A 2 Violini In Unisono A4 Canon Per Motum Contrarium A5 Canon Per Augmentationem, Contrario…