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Try a double-precision kissfft
author Chris Cannam
date Wed, 07 Sep 2016 10:40:32 +0100
parents cf59817a5983
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bqfft
=====

A small library wrapping various FFT implementations for some common
audio processing use cases. Note this is not a general FFT interface,
as it handles only power-of-two FFT sizes and real inputs.

Requires the bqvec library.

C++ standard required: C++98 (does not use C++11)

Copyright 2007-2015 Particular Programs Ltd.

This code originated as part of the Rubber Band Library written by the
same authors (see https://bitbucket.org/breakfastquay/rubberband/).
It has been pulled out into a separate library and relicensed under a
more permissive licence: a BSD/MIT-style licence, as opposed to the
GPL used for Rubber Band.  See the file COPYING for details.