Forums > MaxMSP

non realtime frequency plot – how hard is it?

Mar 18 2010 | 10:49 am


I’ve been trying to make a patch able to export the frequency vs amplitude values (in a form of a table or array or anything similar) from an audio signal. It doesn’t have to be real time. In fact, I prefer it non realtime…

Ideally, I would like to trigger the patch for say 10 secs and get the frequency response of the audio for these 10 secs.

Hope it makes sense :)

I’m not bothered about visual representation, although it’ll be easy once I’ve got the values.

Unfortunately, I don’t have great joy at the moment. My approach is to use a [cartopol~] after the [fft~] and convert (somehow) the theta into Hz, so as I can export the amplitude and frequency from the [cartopol~].

Not even sure if it’s a right approach so any advice is more than welcome :)


Mar 18 2010 | 1:10 pm

When you mention table or array, I’m thinking Jitter matrices. Check the phase vocoder patches I made available on the share page.
Also, your approach sounds kind-of right, but using [pfft~] instead of [fft~] might give you great joy.

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Forums > MaxMSP