Python script for generating exponential throat adaptor

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Python script for generating exponential throat adaptor (http://www.diyaudio.com/forums/software-tools/267850-python-script-generating-exponential-throat-adaptor.html#post4182305)

[Hoerninger]

Thank you for sharing.
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Peter

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I have improved the script to genereate an adapter which adapts not only radius, but also cutoff frequency.