Paul D
Posts: 4
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 Posted - Tue Aug 12, 2003 9:23 am
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I have used Cool Edit (mix of filtering and noise reduction) to tidy up traffic rumble etc from a project which I have mastered to DVD.
The DVD master is being used to run off VHS copies, but there are several sequences of bird song and on the VHS copies each song is accompanied by deep, fluttery background noises.
There's nothing audible on the DVD master, but if I disable Hifi playback on the VHS machines (and just leave a mono soundtrack) the problem disappears, so it does seem to be something to do with the Hifi soundtrack.
A friend has suggested that Cool Edit has left behind artefacts which are inaudible to me, but which nevertheless interfere with Hifi playback. Having checked tape stock, leads, machines etc this is the only suggestion that fits.
Does anyone have any experience which would confirm that this is the problem?
And more importantly can anyone suggest a solution? I have to get some clean VHS copies out shortly, so this is an urgent problem and any assistance would be very welcome.
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Craig Jackman
Location: Canada
Posts: 909
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Posted - Tue Aug 12, 2003 10:15 am
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Oh I doubt it.
If you playback the DVD and it sounds fine, the mono track on the VHS sounds fine, but the VHS hifi stereo track sounds funny, then the problem is 99 times out of 100 going to be in the VHS recorder, probably tape stretch or tape transport or phase error related to those 2.
Are you dubbing to VHS in real time or high speed? Are your connections analog?
If you don't hear it on the analog out of the DVD, it's not something CEP left behind.
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Cool Edit+DVD+VHS tape = problem
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