DETHUMP
Eliminate extended low-frequency thumps
CEDAR Dethump
CEDAR Dethump eliminates the extended low-frequency thumps that cannot be restored using conventional declicking processes and filters. It replaces the unwanted sound with restored low frequency audio and is the ideal tool for removing many of the previously intractable problems associated with optical soundtracks, cylinders, 78rpm discs, and even modern recordings when, for example, microphones and stands are bumped.
Vocal Production Audio Restoration Podcast Production Video ProductionRepair audio from
- Optical soundtracks
- Cylinders
- 78rpm discs
- Microphone 'bumps'
Removing thumps
Thumps can last for many hundreds of milliseconds, so conventional declicking processes are unsuitable for restoring audio containing them.
Furthermore, the spectral content of thumps will usually overlap the genuine signal, so simple filters cannot remove them without degrading the underlying signal.
CEDAR Dethump eliminates low frequency disturbances of up to 100,000 samples duration. It allows the user to identify the audio that constitutes the thump and uses the data in and around this to build up a picture of what the low frequency audio should have been had the thump not occurred.
CEDAR Dethump then replaces the thump with restored low frequency audio, leaving the undamaged high frequency data unaffected. This makes CEDAR Dethump the best tool for removing many of the previously intractable problems associated with optical soundtracks, as well as for restoring damaged cylinders and discs, and for cleaning modern recordings when, for example, microphones and stands are bumped.
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