Vocoders work generally by extracting the formants from the vocals and using them to modulate a carrier signal.

Speaking very generally (I know this isn't 100% accurate at a technical level but it's "good enough" for this discussion), formants are the parts of speech which have a relatively constant pitch/speed/intensity no matter what note is actually being sung. When you put a sound through a vocoder, it *has no* pitch - the pitch is determined by the carrier signal and ONLY the carrier signal. The only exception to this is when the vocoded signal is crossfaded with the original, but AFAIK that's rarely done...

So the simple answer to your question is, it's not merely "common" but absolutely fundamental for the carrier notes to change, since the original vocal sample doesn't control the pitch of the vocoder at all.

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ahhh i see! Thank you very much, that's the answer i was lookin for. Helpfull reply.

cheers

quote:

Originally posted by Leighton_Tyler was just wondering something about vocoding lately. K, u have ur voice wav file and ur carrier signal which is any synth note(s) playing. Im curious if its common to change the actual carrier notes to match the notes of the voice or are they usually left alone to let the voice control the pitches?

You do change the notes in order to better match the way the vocal moves.

quote:

Originally posted by DigiNut Vocoders work generally by extracting the formants from the vocals and using them to modulate a carrier signal. Speaking very generally (I know this isn't 100% accurate at a technical level but it's "good enough" for this discussion), formants are the parts of speech which have a relatively constant pitch/speed/intensity no matter what note is actually being sung. When you put a sound through a vocoder, it *has no* pitch - the pitch is determined by the carrier signal and ONLY the carrier signal. The only exception to this is when the vocoded signal is crossfaded with the original, but AFAIK that's rarely done... So the simple answer to your question is, it's not merely "common" but absolutely fundamental for the carrier notes to change, since the original vocal sample doesn't control the pitch of the vocoder at all.

talking is changing the pitch of your voice to make sounds correct?
so (im just guessing here) the pitch is determined by both carrier and modulator. so the note you play in the carrier determines the general pitch or the "key" (in lack of better term) of the modulator. otherwise the same sound that cme in the vocoder would come out the same.

im just thinking/asking with my poor knolege of sound.

if you know the melody you are going to play using the carrier it can sound stunning if you actually 'sing' (I'll use the term loosly ) the notes too and mix some of the original sound (the modulator) back into the mix.

quote:

Originally posted by dj jasonF talking is changing the pitch of your voice to make sounds correct? so (im just guessing here) the pitch is determined by both carrier and modulator. so the note you play in the carrier determines the general pitch or the "key" (in lack of better term) of the modulator. otherwise the same sound that cme in the vocoder would come out the same. im just thinking/asking with my poor knolege of sound.

The formants from a vocal are used to modulate a filter cutoff (and sometimes the amplitude) of a carrier. Modulating those things does not change the pitch.

That really is the whole idea behind a vocoder; otherwise you could just use a pitch shifter.

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2009-06-18 - DJ Annoying @ People Need To Know Where I'll Be
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2048-06-66 - Spastic & Whocares ¶ Although I'm Actually Flattered
9999-45-81 - Tweaker Gimp ☼ I Probably Won't Even Go To This But I Have To Make Sure I Fill Up All The Available Space Here