I have just listened to Gould's recording of the Art of fugue and I found it great. I just wondered why he didn't complete the work. In my edition of the work, there are : Contrapunctus I-XIV and Canons in Hypodiapason, alla Decima, alla Duodecima, in Hypodiatessaron.
Gould doesn't play Contrapunctus 10, 12. He doesn't play Canon in Hypodiapason, Canon Per Augmentationem In Contrario Motu, Canon alla Decima (Contrapunto alla Terza).
Does anyone know why ? Thanks.