General beginner Q about sampling

Question

Hi Guys, I never usually sample, I mainly just record audio, so please forgive me if this question is a little basic. here goes....
for eg. say you made a beat at 90 bpm you like... your trying to fit a sample over it (from a record say) and you dont know its tempo...but its alot slower maybe 70 bpm
if you cut the samples from the record to start on beat (or at peak of wave) and then play them through your keyboard/pads in time with the original beat you made at 90bpm ..... Will it work??
or do you need to stretch the sample from the record to match your beat that you made in the first place, before you slice it and assign it to pads in exs24?

Answer 1

The technique you described about cutting up the 70 BPM loop, and playing the individual slices from the keyboard, at the new tempo, is a technique that has been around for quite some time.
It is built in to Spectrasonics RMX, and other loop players. So yes, that will definitely "work"
You could also simply try time stretching the loop as a whole, and see what results you get. This often works fine, using the right algorithm, and almost always works admirably, when stretching (or in this case, compressing) from a slower tempo to a faster one.
On a side note... read the EXS manual about rex files. There is actually a procedure (although admittedly I haven't done this in years), where using Propellerheads REX software, you can create a REX file (an automatically sliced version of your loop), import that REX file into the EXS (this creates an EXS instrument with each slice assigned chromatically up the keyboard), and a MIDI file of that sliced loop appears right on Logics arrange page.