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Nice script :) I did a similar thing by hand with graphicsmagick and sox a couple years ago - the most fun result was from wahwah, pretty much a wide bandpass filter with centre frequency varying cyclically over time: http://lewisinthelandofmachines.tumblr.com/post/59405537096/...

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Thank you!

I haven't even tried the wahwah effect, you've definitely piqued my interest.

I had a look through the SoX effects list[1] for the wahwah, but can't seem to find it. The closest thing I found was the 'flanger' effect[2].

[1] http://sox.sourceforge.net/sox.html#EFFECTS

[2] https://allg.one/zKMP

Shamefully I can't remember which wahwah I used - I was treating the audio with both Audacity and Pro Tools as well as sox though...

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