I don't mean to be a jerk here. I say this as a guy who came up using the old-school gear (where you had to figure out how the BPM of your loop, you'd bust out the calculator, multiply 60xSampling Rate, divide it by your sample length (in samples) and there you've got your BPM. So for a 44.1kHz sample, it's:
60x44100/length=BPM
and there's your algebra formula for calculating timestretching (well, not quite. For that, you also need to calculate percentages or ratios of old tempo to new tempo) and beatmatching.)
See what I mean? When you can pull that science outta your frontal lobe as needed, you've got a bit of the old school flava, as they say. Nowadays, you drag 'n drop your loop in Acid and it matches by itself. So, for most, this is a forgotten skill. (Of course, they guys who are getting paid making these Acid libraries are using this knowledge!)
Learning an old-school sampler is like boot camp. It's gonna be hard as hell. You're gonna work yourself into frustration many, many times. You're gonna want to quit, and you're gonna think it's stupid and pointless. But as you stick with it, you'll get better and better, and you'll begin to see why you learned all this stuff in the first place. You'll notice the numbers that you'vwe crammed into your brain show up all over the place, and this gives you a new view on how sound works, how sound design works, and how the science behind the beats works.
This is why owning (and using!)an old-school sampler confers a degree of legitimacy. Not because it's a magic piece of gear (though the feel and sound of the early MPCs can't be denied), but rather: if you're using one of these beasts right, you've got a head full of science, and every sound you create with it is your own. I mean, you sampled the vinyl, the synth, the banging-on-trashcans and made your own library with it. That automatically garners respect.
"Where do I get more sounds for my MPC"? Between your ears, man, between your ears.
-Hoax
The wise man knows that he knows nothing.
Bookmarks