During the Quadraphonic period not all of the labels released quad versions of the standard Stereo releases, but that doesn’t mean to say they ignored the format, it’s just that they had not found a system that met all of their requirements, and they created quad mixes for the day when they found a system that fitted their requirements.
Unfortunately, that day never arrived and those mixes stayed locked away in the vaults until the label Pentatone requested access to them for commercial release.
These two labels were ‘Philips’ And ‘Deutsche Grammophon’, and now we have the chance of finally hearing the Quad mixes of many a well respected album.
Rather than do a release containing all of the (so far) available releases i have added links for the three different series that Pentatone have created covering the releases, which are on SACD. It is advised to keep checking back on those pages for new releases as i’ll not be adding them here.
DG (Deutsche Grammophon)
Philips Classics (Philips)