ok I now I tried a crude and quick multiresolution FFT analysis at log 2 basis and it seems to work. However my partial and transient tracking does not work naymore on the higher bands since there is too much modulation from the windows now, but it seems that in general this is the direction to go, with some refinements-


Am 04.11.2018 um 14:55 schrieb gm:

Maybe you could make the analysis with a filterbank, and do the resynthesis with FFT?

Years ago I made such a synth based on "analog" Fourier Transforms,
(the signal is modulated and rotated down to 0 Frequency and that frequencies around DC are lowpass filtered
depending on the bandwitdh yoe need)
it it did the inverse transform by modulated sines, but sounded rather reverberant though
since the analysis has a rather long IR on the lowest bands.
I used 72 Bands based on a Bark scale.

Maybe I should try something like that again...
However it's absolutely not clear to me how to go from 72 (or what ever) broadband bands
to FFT frequencies and bands?

Maybe you could just use the amplitude spectrum from the bank and the frequencies from an FFT.
Any objections?

The frequencies would be wrong before transients, but the benefit is that you get a good spectral envelope
and you can have a really sharp transient detection.

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