"Fixing" a vinyl 78 rpm record recorded at 45 rpm

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garyrice

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I'm digitizing my collection of 78 rpm records to CD. I have the following tools:
- fancy turntable that only plays at 33.3 or 45 RPM
- Digital Performer v3
- Mac G4

I've recorded one record as a test. It's a 78 that I played at 45 rpm during the recording step.

I now have a DP "soundbite" that needs to be "speeded up" to make it sound "normal". How do I do that with Digital Performer v3?


Gary
 
Not only do you need to change the speed you need to "undo" the RIAA equalization and reapply the correct equalization after correcting the speed. Equalization curves for 78 RPM records varied by manufacturer.
 
Plus you need a stylus that's meant for 78's since the groove is much bigger on 78's than it is on 45's or LP's.
And if it's truly a fancy turntable then it's gonna have an audiophile type cart/stylus which is even smaller ..... sometimes too small to even play a 78. I don't very seriously you're gonna be able to get a decent sound this way.
 
I am familar with the RIAA curve and stylus issues and I've addressed them myself. What I lack is the knowledge of DP and how to manipulate the speed.

My books hint at using "Transpose" so I tried that with poor results.


Gary
 
I wouldn't do it in DP; I'm not even sure DP has the ability to change the speed/pitch like that. Normally when you're doing the sorts of things you'd use DP for, if you're adjusting the speed, you don't want the pitch to change; in this case, you do.

Download a plain-jane destructive editing app, e.g. Sound Studio, Audacity, etc. and use that. For example, in Audacity, try the "Set Rate" option. Then tell it to downconvert to a standard sample rate after you've gotten the speed right.
 
I sort of suspected that DP wasn't up to the "change speed" task. I have both Sound Studio and Amadeus II but BOTH are terribly unstable and crash my computer a LOT.

I was hoping that DP could do it because it has never crashed.

I have a VST interface to DP. Does that change my options any?

Gary
 
garyrice said:
I sort of suspected that DP wasn't up to the "change speed" task. I have both Sound Studio and Amadeus II but BOTH are terribly unstable and crash my computer a LOT.

I was hoping that DP could do it because it has never crashed.

I have a VST interface to DP. Does that change my options any?

Gary
Click to expand...
wouldn't it be MUCH easier to simply pick up a table with 78rpm on it? You can find them all day long for cheap at flea markets and such.
I seriously doubt you're gonna get a good sound this way.
Changing speed digitally is just about always gonna leave significant artifacts.

This looks like about the most convoluted complex and likely poor sounding way to do this.
I just got an old budget level Dual 'table with 78rpm on it (the very reason i got it since it's not really the quality I like in a 'table ) for 25 bucks.
 
You can get wide groove cartridges for modern turntables. I'd run that into a non-phono preamp and manually eq it after speed correction.
 
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