Calimaw

New to the forum, and getting familiar with MAX again.

I am curious about FFTs and how I can use it (or others) to produce a 'growling' effect akin to what a heavy metal singer is able to.

I have played around with a few things and what I have come up with is to use a noise signal to modulate an incoming signal to produce a fairly gruff sounding effect.

This effect is not close enough to the result of a heavy metal growl as I would like it to be.

I'm new to using FFT, I don't quite understand how to make sense of the values, or what arguments it takes.

If some one with the a bit of generosity that doesn't have a zero-sum personality would be willing to help I would greatly appreciate it.

Please feel free to ask me to give more details if there is any question about what I am trying to accomplish! :)

heavy-metal-growling-vocoder

Have you tried using other signals other than noise? What about "growly" sounds? Motor bike engine perhaps? A short sample of someone downing the growling you want to emulate?

Yes I have actually used a seamless loop of a person who can growl quite well as the modulator and as you may expect it sounds precisely like the noise signal modulation with the addition of a bandpass (due to the human formant).

Growling is by nature a chaotic signal with high dynamic range, which is precisely what noise is.

The information I seek is perhaps similar to a lot of other FFT vocoders that take many steps in producing their intended result.

I am looking to expand my knowledge of using FFT to vocode and looking beyond just the simple multiplication of 2 samples amplitudes to produce an effect.

I need more information on how one signal can be used to modify another in either the frequency domain or amplitude domain (or ways to combine them differently)

Heavy Metal 'growling' vocoder