The dsp::FFT calls reference says that I should create a different FFT object for forward and inverse transformations because there is overhead in creating one. I am happy to do that, but there is no argument in the constructor that sets the direction. Do I just create two identical ones and use one for forward, one for inverse, or is this outdated information?
Not sure why that comment says “direction of transform”. You’d think only the size matters. Just create one FFT object and used it for both forward and backward.
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