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Re: [ARSCLIST] Cassette players (pitch correction)

With voice-grade stuff, I just don't get too scientific about the EQ. Most of the stuff I've
transferred was recorded so badly it needs some pretty serious EQ for enhanced audibility anyway,
which I do by ear (no beefs from clients so far, many kudos). So net-net, it's far off the standard
curve anyway. But your point is correct and one thing that gives pause about doing this for
music-grade material is I've never seen the 3.75IPS playback EQ curve published anywhere so I
wouldn't know exactly what to compensate when I halved the pitch.

-- Tom Fine

----- Original Message ----- From: "Eric Jacobs" <EricJ@xxxxxxxxxxxxxxxxxxx>
To: <ARSCLIST@xxxxxxxxxxxxxxxx>
Sent: Thursday, October 09, 2008 8:26 PM
Subject: Re: [ARSCLIST] Cassette players (pitch correction)

On Thursday, October 09, 2008 4:32 PM, Tom Fine wrote:

The 122 also will playback at 3.75IPS for double-speed transfers, which is
just fine for voice-grade stuff and saved one client a substantial amount

The EQ will be incorrect when transferring at double speed. If you want things to sound as correct as possible, you will need to make EQ adjustments in addition to the pitch correction.

By the way, you can find a pitch correction calculator here:


I have a spreadsheet which computes the EQ correction for various pitch
changes.  When I finally have a moment, I hope to put that up as a general
purpose web calculator.

Eric Jacobs

The Audio Archive, Inc.
tel: 408.221.2128
fax: 408.549.9867
Disc and Tape Audio Transfer Services and Preservation Consulting

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