Hi Michael, have you had a look at the freqtweak application recently announced on the LAD list? It has some features you might be interested in. Apart from that i share your opinion about FFTW, however, it's not quite lightweight.... The algorithm for such a plugin is not hard to devise... you have to decompose the input signal stream into overlapped grains (or "windows"), do your spectral transformation, and then recompose the grains into a continuous stream for output. Be aware of the fact that the due to the granular nature of such an algorithm, the larger the spectral resolution (fft size) is, the larger is the inherent delay of your effect! Scoot has been working on such things as well, i guess.

best greetings, Thomas

Hello Thomas, Scott and list,

I would like to build an external, which is a combination of the Native Instruments Spectral Delay and a trigger mechanism in the analysis stage (depending on amplitude) for single bins. I tried to build it with the objects available for PD, but although limiting it to only 200 bins, it couldn't be anything serious to use. Since as far as I know the Spectral Delay is build on the FFTW-algorithm (using the full spectrum), which

seems

to be the fastest freely available, I would like to use it for my external

to.

Thanks for your help Michael

Michael Iber

http://www.iberspace.de mailto://mail@iber-online.de