any ideas on how it's done?
Probably TDHS (time domain harmonic scaling)?

thanks

Luis Fernando wrote:
> 
> hello
> 
> I need to code the "whammy" effect (like
> http://www.digitech.com/products/whammy.htm ) but I didn't find any
> references to it on comp.dsp or other sites I checked
> Is there another name for this effect? Pitch Space maybe?


Yes, that is a real time pitch shifter.

Give an input signal containing frequencies (f0, f1, .. fn),
the output will be a signal containing frequencies (a * f0,
a * f1, ,, a * fn) where a is > 0.

Good luck. This is very difficult to do well.

Erik
-- 
+-----------------------------------------------------------+
  Erik de Castro Lopo  nospam@mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
A Microsoft Certified System Engineer is to computing what a
MacDonalds Certified Food Specialist is to fine cuisine.

As far as I can see, it's just a pitch shifter with some unique ways of
controlling the pitch shift interval.  I would start by searching for pitch
shift algorithms.

"Luis Fernando" <wavebox@wavebox.com.br> wrote in message
news:fb78d2e7.0408201532.333ad7b5@posting.google.com...
> hello
>
> I need to code the "whammy" effect (like
> http://www.digitech.com/products/whammy.htm ) but I didn't find any
> references to it on comp.dsp or other sites I checked
> Is there another name for this effect? Pitch Space maybe?
>
> thanks

hello

I need to code the "whammy" effect (like
http://www.digitech.com/products/whammy.htm ) but I didn't find any
references to it on comp.dsp or other sites I checked
Is there another name for this effect? Pitch Space maybe?

thanks