AW: DSP anybody?

[Martin Keefe]

In-Reply-To: <06E83B40290BD111B41B08002BB769DAC5AFD2 at balu.kapsch.co.at>
> Sound generator (sawtooth / rectangle / PW adjust)
> LFO (sine wave / sawtooth )
> Envelope generator
> 
> So I only showed that it is possible but I stopped when I wanted to
> calculate a filter on the fly as my mathematical knowledge is not
> very sophisticated and my time is very limited. But maybe some day
> I could go one with this project.

Yep, I thought those would be the first step as they are fairly straight 
forward. The next stage is some filtering and this is slightly more 
complicated as it needs some "history" (and optionally some "future"!) of 
the signal. A basic FIR and/or IIR is simple in principle -- just weighted 
sums of surrounding samples. Calculating the weights is less obvious but 
must be covered in some standard text. Its off to amazon.com for me!

  ]\/[artin Keefe ][ Dorking,Surrey,UK ][ martink at cix.co.uk