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For starters, try saving it as a WAV file, rather than FLAC. Play the WAV file and see what you get. You can always do a conversion to FL:AC later.

Gary Galo

____________________________

Gary Galo
Audio Engineer Emeritus
The Crane School of Music
SUNY at Potsdam, NY 13676

"Great art presupposes the alert mind of the educated listener."
Arnold Schoenberg

"A true artist doesn't want to be admired, he wants to be believed."
Igor Markevitch

-----Original Message-----
From: Association for Recorded Sound Discussion List [mailto:[log in to unmask]] On Behalf Of CJB
Sent: Friday, August 26, 2016 3:48 PM
To: [log in to unmask]
Subject: [ARSCLIST] Sporadc Tape Warble

We  are digitising 60 year old reel-reel tapes.

For this we are using an Akai DS40000 Mk 2 deck, a Behringer USB digitiser, and Audacity. This is all connected to a Toshiba Qosmio G32 running Ubuntu (Linex).

The tape plays smoothly with no sticky-shed or squealing.

The recording was originally aired by the BBC on FM in the 1970s.

The timeline is BBC Transmission > Radio FM Receiver > Reel-Reel recording > Playback on same tape deck > Behringer digitiser > Audacity > Saved as FLAC file.

However the resulting digital recording has strange intermittent 'warbles.' It is as though the tape was momentarily caught on something.

This is an example. Yes - some do like this kind of music!!! But it is the quality of the digital recording that is of concern.

Any ideas please as to cause?

http://www.mediafire.com/download/zq9d615mr84jn05/Larmona_-_Yetties__%28warble%29.flac

Thank you -

Chris B.