Unfortunately it appears Capstan only works on "polyphonic" musical sources,
not on speech. We had a discussion about this same issue on the Sound on
Sound forum and the company's product manager came on, saying he had tried
but been been unable to successfully reduce wow on speech. All the company's
references to successful removal of wow seem to apply to music only.
Jamie Howarth's "Plagent Process" uses the recorded bias tone as a speed
reference. That normally only applies to professional open reel recordings
but if there are other tones on the recording such as a whistle etc it may
be possible to use that as a speed reference to at least partially fix the
Unusual to have wow at the beginning of a tape side. Usually it will be
worse at the end of a tape side.
----- Original Message -----
From: "John Schroth" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, August 26, 2018 11:43 PM
Subject: [ARSCLIST] Audio Cassette WOW repair
> Hello ARSC members. I'm hoping to get some advice.
> I'm digitizing a collection of aural history interviews recorded on
> cassette tape. The deck that was used for recording was a standard low
> cost portable deck with the built-in mic. Several of the tapes have some
> serious wow at the beginning of the tape. It gets better 5 minutes in
> although it's still there as the recording goes on.
> I'm hoping to repair the wow with at least an acceptable listenable result
> through software. I read a bit about Melodyne Capstan, but it appears to
> me that this program keys in on musical notes to fix wow in content that's
> musical in nature. Since this content is not musical, would Capstan still
> work? The price for the software is beyond the client's budget, so I'm
> happy to work with someone who has the software, if the software would
> work and that person would be interested in a small one-off job.
> Are there other programs that can automatically fix wow in recorded
> content that is spoken word? There's too much content time to try and fix
> this manually and still stay within the client's budget parameters so it
> has to be an automatic software based program that is affordable ($250 or
> less). I can't seem to find other offerings that fit within the client's
> budget parameters.
> Thanks in advance for any input.
> Kind Regards,
> John Schroth
> Media Transfer Service, LLC
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