Re: [linux-audio-dev] Re: Tuning

On Sat, 2005-01-29 at 10:48, Fons Adriaensen wrote:
> On Sat, Jan 29, 2005 at 10:43:37AM -0600, Jan Depner wrote:
> > On Sat, 2005-01-29 at 06:44, Fons Adriaensen wrote:
>
> > > That's a classic one. For large N, the output will approach
> > > some form of filtered Gaussian noise. What makes this fractal
> > > noise superior as a source of randomness in a resample algo ?
> >
> > Because it more closely resembles nature. Take a look at this page:
> >
> > http://swiss.csail.mit.edu/~rauch/islands/
>
> Nice pictures. But:
>
> - Not everything in nature is fractal. Some things (even
> very complex ones) are very clearly not.
>
    All dogs have a tail, that animal has a tail, therefore it is a dog
;-) I didn't say everything in nature is fractal. I said fractal noise
sounds more natural.

> - We are not trying to mimic nature, just to avoid a
> nasty comb filtering effect.
>
    I thought you were trying to make random changes in pitch sound more
natural when using a pitch tuning algorithm.

> - If I gave you two series of samples, one generated with
> the fractal method, and one generated by sending white
> Gaussian noise through a suitable filter, you would have
> no way to tell which is which. And that means there is
> nothing special about the fractal noise, apart from the
> fact that is was generated by an interesting algo :-)

    I disagree. White noise and pink noise are very different.

Jan
Received on Sun Jan 30 00:15:09 2005