[Fpga-synth] Signals and Sample Rates

[Eric Brombaugh]

On May 17, 2008, at 9:43 AM, Scott Gravenhorst wrote:

> Eric, I like your use of the term naive - it describes some of what  
> I did - my sawtooth NCO
> wave is just the upper bits of the phase accumulator.  Not exactly  
> natural at all as you
> point out.

I borrowed that term from Aaron Lanterman - he used it in his lectures  
on digital synthesis to describe the obvious approaches to computing  
saw, pulse and square waves. If you want to get a quick overview of  
how aliasing works and some of the approaches that are used to  
mitigate it in digital synthesis you could do a lot worse than to  
check out that lecture:

http://www.stream.gatech.edu/DCRS/tools/download.php?media=dcrs&id=10921

It appears to still be available (warning - it's a pretty big download).

Eric