Playing 3-3/4 IPS tape on 7 IPS Machine

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RJ_HighRisk

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Hi all:
I'm trying to restore an old tape which was recorded on a 3-3/4 IPS machine by using my 7 IPS machine.
I figured I could dump it off to my computer & with the aid of Adobe Audition "stretch" (or in this case "condense") the pitch.
There is a "ratio" setting to determine this which changes pitch and/or tempo.

Would it be correct in doing the math . . . .

3.75/7=.5357

and using 153.57 as the setting?

I have tried this and it sounds correct, I'm just checking if this would be the way to go . . .

thanks -

RJ Hagler
High Risk Studios
Cleveland - USA
 
No - it's Tascam 388 with a slight pitch adjust pot but no switch

Actually - I got the math reversed !

It should have been:

7/3.75=1.8667

so in the software I used a 186.67 ratio number & let the pitch & tempo be altered.

The tape is an old spoken letter from a deceased relative. I never heard his voice when he was alive to reference but it sounds as if it works.

the tape is on a small plastic reel & I think it's acetate & is about to crumble.

I guess there is a happy joining of analog & digital after all !!

RJ
 
go to the analog forum, theyre smart guys, they can help you out.
 
Standard tape speeds double each time. There is no 7 IPS; it's 7.5 IPS.

From slowest to fastest, here are the standard tape speeds:
15/16 IPS (spoken word, talking books, etc.)
1-7/8 IPS (spoken word, limited music)
3-3/4 IPS (bottom range of most consumer tape decks)
7-1/2 IPS (typical consumer speed)
15 IPS (professional dynamic range)
30 IPS (extended dynamic and high end range)
 
So,...

If you take a 3-3/4 ips source tape, & record it into the 'puter using a 7.5 ips speed, then it would follow that your pitch adjustment factor in the 'puter should be set to "0.5".

Just on first glance, that should work. There may be a slight EQ curve mismatch, but nothing that's a show stopper.;)
 
Thanks for the machine speed info

Knowing those speeds double up each time makes that conversion pretty simple.

RJ
 
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