Abbey Road Studios' Surround Mastering and Restoration engineer, Simon Gibson, recently co-presented a lecture to the Institute of Broadcast Sound alongside Gordon Reid of CEDAR entitled Audio Restoration at Abbey Road Studios and the role of CEDAR Retouch.
Gibson demonstrated how CEDAR Retouch had been use to eliminate
blemishes from the latest remasters of the Beatles catalogue, due for release in September 2009. He had removed low-level noises from
material that had no obvious problems, but which were audibly improved when
the 'before' and 'after' tracks were compared. However, the greatest revelation came when Gibson showed how he used CEDAR Retouch to eliminate individual instruments from mixed tracks so that
they could be used for the forthcoming Beatles Rock Band game. Hearing Paul
McCartney's bass guitar removed from a song without unduly affecting the other
instruments and vocals proved to be a revelation, as did examples where Gibson
separated drums, handclaps, and other instruments in just seconds.
This month's Resolution Magazine interview has him commenting;
"Since we've had Retouch... it's changed the way we [at Abbey Road] work."
"There's no way that Rock Band could happen or we would have been able to offer the first
half of the [Beatles] catalogue without Retouch."
"Retouch... has given us a quicker and easier way of fixing things and a more successful
way. It covers so many different problems."
CEDAR Retouch 4 is a huge leap forward in sound processing technology. Unlike
conventional restoration tools, it provides a wide range of time/frequency editing capabilities, and allows users to define the temporal and spectral content
of the sound that they wish to treat. Retouch 4 allows them to mark
complex areas in its spectrogram using the types of tools commonly found in the
most powerful image manipulation software.
Once identified, unwanted sounds can be eliminated, replaced, moved, copied, or
even remixed seamlessly with the surrounding signal.
All other audio remains untouched.

