master BPM in song for all loops to match?

Getting a bit confused because it seems I've seen this on youtube, but I don't know how to do it.

if I import various disparate loops into various pads, and want to use the MPC as a loop arrangement tool, can I set a master BPM and let the MPC stretch each loop to fit within that BPM?

Just curious.

There are machines that do more of what your talking about, but the Mp isn't really one of them. The Mp is more of a do it yourself type of instrument. It does have timestretching, but again it is more of a manual timestretching. There are mathematical formulas that you can follow to find out what percentage you need to timestretch. (Do a search for Timestretch Calculater and I imagine you should find one. I happen to have one jotted in my notebook...

original tempo divided by the new tempo times 100 = the percentage you need to adjust Timestretch

Not really sure how well this works, but I've recently been meaning to mess with it to see how accurate it is. (Which is why I have the formula in my notebook.)

You may just want to adjust the tuning of your samples to match the tempo. This is more along the lines of what I usually do, and it's the more traditional route. All you do really is set up a loop of how ever many bars the sample is, have the tempo set where you want it, and adjust the tuning of the loop so that it triggers as smoothly as possible. You may run into a problem with the samples being out of tune with each other; This is where the artistic side really needs to kick in. You need to find the right loops that sound good together... Hope this helps, and if you try using the timeshifting please let me know how it goes. Peace, and good luck

great answer, mate thanks for putting some thought into it.

I have a bpm calculator software from like 1996 but haven't had to think about this for a long time... I sold a lot of gear as software started to replace it, but found that I was always more productive and creative before computers came into the equation. so I'm going back to the limits and quirks of hardware....

Amen, and your welcome.