EXS 24 Logic Sampler Users Group

At 04:30 AM 10/8/2006, you wrote:

>hi ive just spent a while making some basic static wave samples sampled to
>root note C0, so i can use my EXS as a wavetable synth.
>BUT.....
>they screech and stutter and scream at the high notes. i think its called
>aliasing but i just want it to stop!

Know the feeling! =)

It's more then just aliasing, to be precise, but no matter what, the 
interpolating nature of playing a sample to a higher pitch then 
originally recorded is tricky.

Are you composing your static samples manually; i.e. with a wave 
processing/creation program? Then create some samples at a higher 
pitch within that composition program, and create a multisampled 
program within the EXS24. Place the higher samples at higher ranges; 
that way, the "original" samples don't have to be played at such a 
high range away from it's unity pitch.

If you are dealing with recorded samples, still, go into a powerful 
sample editor and see what you can do in raising the pitch up a 
certain level. Sample Editors can be more effective in this then the 
real-time processing of the sampler itself.

Some samplers refuse to raise the pitch of a sample higher then a 
certain range away from the unity pitch, Kurzweil's limit is 24 
semitones, I think Giga's is the same or it's 36 semitones. After 
that point, the sample is simply played back as the highest possible 
pitch. But most samplers keep raiding the pitch, sometimes with awful 
sounding results, but sometimes it's OK.



Garth Hjelte
Sampler User