EXS 24 Logic Sampler Users Group

>Well, you better bounce like C0 through C6, a) to reduce CPU usage (which >is noticeable more or less drastically), especially on chords and b) to >avoid aliasing (which is indeed happening once the EXS has to pitch zones a >lot).

  Maybe I wrong, it's a long time since learnt about this,  but I always thought that aliasing happens when the harmonics of a wave pass up and beyond the 20KHz frequency limit set by a 44.1 sample rate.   As a pure sine wave has no harmonics I do not see how aliasing could occur in this case.    Maybe you think the sine in question is not very pure?
No sampled wave is "pure", since it has "corners" on it.  When you raise the pitch of a sampled sound, you have to
throw out samples.  When you lower the pitch of a sample, you have to create new samples.  This means there
are decisions to be made about which samples to get rid of or create.  Sample a sine wave at 10kHz and play it
back 7 octaves lower (about 75Hz).  You will probably not be hearing a pure 75Hz tone, you will also hear nasty
"crusty" sounds, which are actually the "corners" of the original sample, expanded out to much bigger "size".
A lot of us love these artifacts and use them all them time in our music.  Nevertheless, it is "incorrect"
behavior.


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