[PD] nearest neighbour matching?

[Jamie Bullock]

Hi Claude,

On 5 Oct 2012, at 09:47, Claude Heiland-Allen <claude at mathr.co.uk> wrote:

> Hi list,
> 
> I have a -batch patch that randomly samples the parameter space of control signals to (some black box)* and uses [sigmund~] to detect pitched-ness vs unpitchedness, keeping the pitch info and then a notch filter to detect distortion:
> 
> http://mathr.co.uk/softrockiii/2012-10-05_probe-puredata.png
> 
> So I end up with gnuplots that look something like this:
> 
> http://mathr.co.uk/softrockiii/2012-10-05_pitching-distortion.png
> 
> Now I want to find the best match for a given pitch and distortion and get back the corresponding parameters that approximately reconstruct the desired sound.
> 
> What's the best way to go about this?
> 
> I might end up just hand-rolling some Lua for this kind of matching if no one has any better ideas.

You may be interested in the [knn] external, which implements the k's nearest neighbour algorithm.

It can be found in svn in postlude/knn.

The classic paper on its use can be found here: http://www.music.mcgill.ca/~ich/research/icmc00/icmc00.timbre.pdf

best,

Jamie

--
http://jamiebullock.com