[Noisebridge-discuss] Hearing augmentation

[Christoph Maier]

On Fri, 2009-05-22 at 14:07 -0700, d p chang wrote:
> Christie Dudley <longobord at gmail.com> writes:
> 
> > Frequency shift is hard.
> 
> poor man's frequency shift down is just dropping samples. unfortunately
> this will change the pitch enough that i'm not sure it would be useful
> for identifying a bird.
> 
> \p

Actually, to shift the frequency down an octave you'd just use every
sample twice ... or cut the sampling rate in half.

The really interesting problem is how to speed up or slow down the
individual oscillation while not changing the time the entire sound
takes. 

Anyhow, what's that tool called again that makes every singer (even Ms
Spears and Winehouse) sound pitch perfect?

Christoph