Pattern-matching with analyzer~

Oct 10, 2011 at 8:25pm

Pattern-matching with analyzer~

Hello,

I’m looking for a pattern-matching object or system that can take the continuous output of something like analyzer~ and notice time based trends. Specifically the trends I’m seeking to identify is the sounds of a siren passing by on a street (long slow change in pitch, quick “woop” at the right frequency followed by certain amount of silence, etc).

Anyone have any recommendations or ideas on how to approach this? Might the FTM gesture follower v(http://ftm.ircam.fr/index.php/Gesture_Follower) be a candidate?

I imagine that this will also involve some serious noise reduction and filtering as well.

Thanks!!

#59244
Oct 13, 2011 at 2:33pm

Any ideas guys?

Thanks.

#212873
Oct 13, 2011 at 2:52pm

I have nothing to add here but my interest as well.

#212874
Oct 13, 2011 at 7:41pm

Just off the top of my head, if you can identify exact strings that are produced , OR can map the desired output into a reproducable set of strings, the REGEXP world can be your pattern matching friend…
just an idea. & yes, the challenge is identifying the output you want to match on, and getting the desired input to always produce the ‘matchable’ strings… detect ranges of input,important ‘cue’ values, etc, etc.

#212875
Oct 18, 2011 at 3:13am

I’ll look into regexp! Thanks for the recommendations. Any ideas for noise reduction/filtering?

Thanks

#212876
Oct 18, 2011 at 9:27pm

depends what you are looking for: a noise gate with adjustable threshold would be a strong need, to avoid the analysis from trying to analyze ur..room noise, etc.: you need a strong enough signal to analyze!! Then, avoid the extremes of low and high freq… low is tough to analyze, high has lots of randomness, also tough to get clean stuff from…
just a off the cuff response… g’luck!!

#212877

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