These two volumes are being released together and simultaneously, as a sign of continuation.

For Luc Ferrari, this is the first full-length CD to come out after the trilogy we developed with him Les anecdotiques /2002, a fifteen-part suite (CD SR207), Son Mémorisé /1976-2002 (CD SR252) and Didascalies /2007 (CD SR259).
What we have here is three substantial pieces: Programme commun pour clavecin et bande magnétique/1972
performed by Elisabeth Chojnacka, Didascalies 2 /1993 performed by Jean-Philippe Collard-Neven, Claude Berset, and Vincent Royer (in 2009) and available only on vinyl SRV305 (note that Didascalies and Didascalies 2 are two different compositions), and another previously unreleased piece that he held dear: Les émois d'Aphrodite/1986-1998, performed by San Francisco's MC Band under his direction.