Unique Synthesis Techniques.

[aperson]

Re: Unique Synthesis Techniques.

FYI formant filters are nothing but rolling bandpass filters:


Look up the formant pattern for the vowel shape you want and bandpass it accordingly. If you want to demonstrate that they are nothing more to yourself, sing a constant note and move your mouth from an ooo to an aaa and listen to the wah-sounding bandpass up as you go.

[championanwar]

Re: Unique Synthesis Techniques.

FYI formant filters are nothing but rolling bandpass filters:


Look up the formant pattern for the vowel shape you want and bandpass it accordingly. If you want to demonstrate that they are nothing more to yourself, sing a constant note and move your mouth from an ooo to an aaa and listen to the wah-sounding bandpass up as you go.

Perfect, I'll look into it more. Got a website with filter patterns, like that pic above? :3

[aperson]

Re: Unique Synthesis Techniques.

Perfect, I'll look into it more. Got a website with filter patterns, like that pic above? :3

Got a mic and a spectrograph?

[DarkbearX]

Re: Unique Synthesis Techniques.

That graph also shows that you can't just simply throw a bandpass filter and make a true/pure vocal formant, otherwise bandpass filters would just be called... formant filters. Bandpass filters cut out way too many fundamental frequencies.

[aperson]

Re: Unique Synthesis Techniques.

That graph also shows that you can't just simply throw a bandpass filter and make a true/pure vocal formant, otherwise bandpass filters would just be called... formant filters. Bandpass filters cut out way too many fundamental frequencies.

???

Well then just add in a bandpass on the fundamental? The next harmonic doesn't appear until the next octave so you can set its std. deviation pretty wide. You're right though that formants aren't bandpass filters, but they are a very basic sum of bandpass filters.

I'm not sure on the specifics of how it works, but the sound it gives is often similar to when you take a flanger, and turn the feedback close to 100/-100%. Only difference that I can see is that it doesn't have an LFO on the frequency and it doesn't change phase or anything. I really shouldn't be answering this question though. Hopefully someone else can phrase it better.

Flangers are essentially comb filters. A comb filter works by summing delays of less than a period of the fundamental to cause haphazard constructive and destructive interference. Flangers do the same thing, except they usually have a sliding delay interval rather than a consant one.

[DarkbearX]

Re: Unique Synthesis Techniques.

???

Well then just add in a bandpass on the fundamental? The next harmonic doesn't appear until the next octave so you can set its std. deviation pretty wide. You're right though that formants aren't bandpass filters, but they are a very basic sum of bandpass filters.

But once you add one bandpass filter to a sound, it will only pass the frequencies -inside- the pass band; everything else is completely cut out. As far as I know you can't really add any more bandpass filters to an existing one as far as using a parametric equalizer goes. I mean, you're right that it's pretty much a sum of BP filters but in practice that doesn't really work.