Detuning a sped-up sample (45rpm +8) back to original on MPC

Exactly how much does one need to detune a sped up record (1. a 33rpm record sped up to 45rpm and +8. and also 2. a 45rpm 7" record sped up +8) to make it exactly the same speed as the original recording on an MPC (MPC 60 in my case)? (I already did lots of research but can't seem to find that magic "perfect" number/value of detune)

There has to be an exact "number", but I have yet to find the number...to detune a sped up vinyl exactly back to original speed and pitch.

I am new at producing, but so far I've just been doing it by ear and tempo. and I have found that:

1.) An originally played 33rpm 12" sped up at 45rpm and +8 needs detuning of: about -67 to -72 on my MPC 60, though I don't know exactly which number/value is the perfect one.

2.) An originally played 45rpm 7" sped up only +8 (since already on 45rpm) needs detuning of: I haven't sampled or tested any 45s/7"ers yet.


..there gotta be a simple number, since all the speeds are relative. ie: original 33rpm vs it sped up 45rpm & +8 and also a 7" sped up +8 ...I would think it would always be the same number/value of detune, of course if the turntable is perfectly calibrated.

Any insight appreciated.

...just trying to get my samples in perfect tuning and know exactly what key it's in, etc...

google hard. I know i saw exact numbers with the math breakdown of how it happens somewhere... mpc-forums, gearslutz, or dogsonacid likely..

sorry im not much help but i know the info is allready out there somewhere..

No there is no simple number when you talk about the +8%.
Well....it is but the problem is that you can't put your turntable to that exact +8%. Its a resistor and its build into a circuit with more resistors and other parts so it will never be exactly 8% (without open the turntable and going deeper in electronic stuff, adjustments etc).

The number for 33 1/3 rpm records sampled with 45 rpm is -5,2 semitones so I guess on the 3000 its -52

peace

Who cares, man??
Just make music.
Not even trying to be an ass, but you're thinking about this too much.............

Willis Reed wrote:Who cares, man??
Just make music.
Not even trying to be an ass, but you're thinking about this too much.............

Yes if your music is made only by yourself and only with MPC, PC

No if you work together with others, singer, guitarists, bassists etc. They wont like to tune their instruments just because you can't give them an instrumental thats in tune.

peace

So, you're telling someone who's just starting out to not only do it by ear?
Should he even be thinking about this right now?

I'm doing this for a hobby, so maybe I just come from another line of thinking.

He seem that he can "handle" this thinking although he might be a beginner
I'm not sayin that this analyzing, math thing is the only way to go or the better way.
But I've heard enough examples of beats that sound awful just because an instrument was out of tune (its often the bass). There is a way to be out of tune that sound acceptable but its often not (to MY ear. maybe someone elses ears are more liberal)

peace

Yeah, guess you're right
He probably asks for a reason, right?