Question about mpc pitch / tune

Hello everybody

My question is the following:

Lets say I have a sample and I tune it to +20 in the MPC.

Now, I want to duplicate that effect on my computer using samplitude. Do you know what the +20 stands for? is it 20 Percent? or what exactly does it mean and how can I duplicate the effect on my computer (I guess it has something to do with the bpm)

Thanks in advance.

Greetings from switzerland

I don't know what mpc you have, but on mine it's semitones

+/- 10 in an MPC (XL at least) is one note....semitones like homeboy said.

So +20 is a whole-step up (ie. C->D, but NOT E->F).

ok so how changes the speed in regard of the pitch? or how can I calculate that?

The speed changes in the same ratio as the pitch.

my math is whack...but its ~12% up.

Am I totally wrong?! I must be...just working it out.

just checked the mpc100 manual - if you use the QLinks to tune, then +10 is a semi-tone up, like nogginj says

but if you use the sample edit feature to change the pitch, +1 is a semitone (which means +12 is a whole octave)

so you really need to say what MPC you're using to get a good answer - or read your manual

nogginj wrote:The speed changes in the same ratio as the pitch.

So, if 120 semitones = 100% pitch increase
100/120 = ~0.83% increase (of original rate) per semitone.
+20 semitones * 0.83% = ~16.7%

So if you set your playback rate to be 116.7% of the original, you should get ~20 semitones up.

Am I totally wrong?!

Not correct. :
If 120 semitones is 100% pitch increase it means that the frequency is doubled

To find the semitone we need to know how this work.

The formula is: 2^(n/12)*44100

The n is the semitone and the 44100 is the samplerate.

The +20 in the MPC is shown in tenth of a semitone.

Now go into trimmode and see how many samples the wave consists of, example 163527.

Now we can do some math: We play 44100 samples per second therefore: 163527/44100=3.7081 seconds
that is 3.7081/60(minutes)=0.061802 minutes per beat.

To reverse that we say 1/0.061802*4(4 beats per bar)=64.7233 beats per minute.

Now we pitch up the samples by 20, and we use the formula: 2^(2/12)*44100=49500.6Hz (imaginary) samplerate.

We then proceed like before:

163527/49500.6 = 3.30354 seconds
3.30354/60 = 0.055059 minutes per beat
1/0.055059*4 = 72.6493 beats per minute

As simple as that

For this to work you have to multiply the result with numbers of bars.

Thanks for the calculating elmer...I know my original was incorrect, hence the edit. We both must have been working it out at the same time, cause I got that wrong math off pretty quick after posting it (hey I tried).

~12% up is correct to get a whole step up (your math validates this as well).

nogginj wrote:Thanks for the calculating elmer...I know my original was incorrect, hence the edit. We both must have been working it out at the same time, cause I got that wrong math off pretty quick after posting it (hey I tried).

Hey, my English/American is not so good so i might have offended you unintentional, sorry if i did.

nogginj wrote:~12% up is correct to get a whole step up (your math validates this as well).

Yes, you are right

Thank you so much guys ur the best!!