Hi,

I'm working on a patch where I want to record some short samples... My mission is to save its spectral data (fft~) in arrays and then make like a "live patch" that when the same hit is captured by the microphone it triggers some midi note.. so it has to compare the new hit with the recorded one and if it matches then triggers the midi note (which i plan to send to NI Battery to play some prerecorded file)

Ok then.. I can record the sample and analize it with fft~... what i don't know how to do is to save that data to arrays..... then i will check out how to traverse those arrays and compare them with the "live captured" hit...

any tips ?

im attaching my patch

http://www.pdpatchrepo.info/hurleur/super_especial.pd

Check this post
http://puredata.hurleur.com/sujet-2508-frequency-analyzer

I posted a patch in there "spect.pd" which analyzes and write the spectrum data in a table which you can then save, recall, and so on.

There is a problem with what you have in your mind though: You want to compare the spectrum of two sounds, whereas the spectrum of a sound is NOT something stable that you can get the "exact" same result each time you analyze even exactly the same sound. You should focus on specific partials a particular sound has dominating over the others in its spectrum, then you can compare the two sound that has same characteristics in their timbre.

There is another patch in there called "spect2.pd" which has a threshold you can set to have only the partials with an amplitude above the threshold pass through. By using such a function, you can detect which partials are dominant in the sound you have in your mind as basis for comparison, and make a patch that looks for those in the spectral data you provide for it.

that looks great tcihan! thanks. not sure why i missed it the first time.

hey thanks ! this is very useful !

for what are you using biquad~ ?

Do u have any idea how can i save this information to a collection of arrays or something ?

thanks again !!

look at [bonk~] its does just what you need.
attached:bonk~-help.pd

http://www.pdpatchrepo.info/hurleur/bonk~-help.pd

wow i think this was exactly what i was looking for !!

thaaaanks