[sdiy] Novation peak NCOs

[Richie Burnett]

It stands for Band-Limited Impulse Train, and is a mathematical technique that can be used to generate sawtooth waveforms digitally at a moderate sampling rate with little or no aliasing. Explanation is quite lengthy, so search for a paper called "Alias-Free Digital Synthesis of Classic Analog Waveforms" by Tim Stilson for the gory details!

A similar paper by Eli Brandt called "Hard Sync Without Aliasing" is also worth grabbing if you want to know about BLEP, BLAM, etc which are some refinements/extensions to the method.

-Richie,

Sent from my Xperia SP on O2

---- Ben Bradley wrote ----

>>You will always need BLITs or sums of harmonic series to avoid aliasing, unless you want to say that “a little” aliasing is almost as good as no aliasing at all.
>
>Can you explain what BLIT is in this context? I only know it as a
>bit-mapped computer graphics operation, and indeed that's the only
>technical explanation I can find online.
>
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