Elektron Musical Instruments

On Monday, December 1, 2003, at 02:15  PM, Roonan wrote:

>
> Guess what, I get the exact same results when recording in Wavelab.
> Strange?!?! Shouldn't be that difficult to create a sawtooth or a
> square from a DSP, I wonder how or why they look like this. They
> sure sound good enough to get great results but still....
>

Actually creating a DSP SAW or Rectangle is hard because they are not 
bandlimited. The sharp edges create very high frequency components. 
These of course cause aliasing so they need to be avoided. Making 
either of these sound both full and without undo aliasing is part of 
the art of DSP-based oscillator design.

I haven't looked at the specific waveforms in question so its hard to 
comment, other than in generalities. But as a rule waveforms with the 
same harmonic content but each harmonic with a different static phase 
sound the same (if the phase is changing this is not true). The 
implication of this statement is that two waveforms can look quite 
different and still sound the same. Perhaps this explains some of it.


drK

www.delora.com/music
drk.iuma.com