CEDAR Audio ships CEDAR for Pyramix

CEDAR Retouch for Pyramix CEDAR declick for Pyramix CEDAR decrackle for Pyramix CEDAR dethump for Pyramix

23 August 2004

CEDAR for Pyramix is a powerful upgrade for all Pyramix systems, providing state-of-the-art audio restoration facilities for CD and DVD mastering and remastering, post, broadcast, film soundtrack restoration, and many other purposes. It comprises four packages, all of which operate at high sample rates, and offer 64-bit internal resolution.


CEDAR Retouch™ for Pyramix is a huge leap forward in sound processing technology. Unlike conventional restoration tools, it allows you to define the temporal and spectral content of the sound you want to remove. This makes it possible to identify noises as varied as coughs, squeaky chairs, page turns, the creak of a piano pedal and even car horns. Once identified, unwanted sounds are replaced seamlessly with audio that matches the surrounding signal. All other audio remains untouched.


CEDAR declick for Pyramix performs at high speed without sacrificing CEDAR quality, and addresses the widest possible range of scratch and click removal problems. auto declick allows the user to process part or all of an entire playlist as an off-line process, and the automatic process will cope with even the most severely damaged audio. manual declick incorporates a new algorithm capable of restoring clicks and other problems such as drop-outs and digital errors of up to 2,000 samples duration. It is particularly suitable for repairing optical soundtracks, and ideal for restoring audio that suffers from problems for which standard declick algorithms are not optimised.


CEDAR decrackle for Pyramix doesn't only remove the tiny clicks, crackles and grunge from vintage discs and vinyl LPs... it removes many types of buzz, and can be extremely effective at reducing amplitude distortions. With no parameters for you to worry about, CEDAR's adaptive algorithms will identify and remove all of these noises automatically, making it as applicable to film soundtrack restoration, audio forensics and broadcast as it is to traditional audio restoration jobs such as CD remastering.


DeThump allows users to remove unwanted low frequency energy bursts from audio digitised at sampling rates of up to 96kHz. Such thumps (which occur within signals transcribed from optical soundtracks, damaged 78 rpm records and scratched vinyl discs, as well as modern recordings when, for example, microphones and stands are bumped) may last for many hundreds of milliseconds, so conventional declicking processes are unsuitable for eliminating them. Furthermore, the spectral content of thumps will usually overlap the genuine signal, so simple filters cannot remove them without degrading the underlying signal. Dethump uses the data in and around the damaged signal to build up a picture of what the low frequency data should have been had the thump not occurred. The process then replaces the thump with restored low frequency audio, leaving the undamaged high frequency data unaffected. Processing is very rapid, thus allowing near instant evaluation of the result.

For further information:

CEDAR Audio Limited, 20 Home End, Fulbourn, Cambridge, CB21 5BS, United Kingdom.
t: +44 1223 881771
f: +44 1223 881778
e: info@cedaraudio.com

Merging Engineering and Support HQ, Le Verney, CH-1070 Puidoux, Switzerland.
t: +41 21 946 0444
f: +41 21 946 0445
e: info.europe@merging.com
w: www.merging.com