I'm looking for an audio effect (on Windows) to add a natural sounding vibrato to a vocal track which has virtually no vibrato.

I don't mean the singer didn't use much vibrato, I mean I have artificially reduced the amount using Melodyne and now I want add a different kind of vibrato.

The reason here is that I have a sample library of female voice samples, but I wanted to extend the range a bit by pitch shifting the lowest and highest samples by up to a few semitones (which, using the original vibrato, still sounds fairly convincing). On a pitch-shifted sample I need to have a different vibrato than the original, otherwise it becomes extremely obvious (artificial sounding) if you play two notes together with the same kind of vibrato.

The vibrato implemented in Auto-Tune is not so great for this purpose; no one sings with a vibrato of a fixed rate like 1Hz or below (I think, if they are not deliberately adding vibrato like in classical singing). I also don't know how to reasonably select different rates for the different samples. Vibrato (after the attack phase) sounds/looks more a like random walk, so ideally I want to find a plugin that realizes something close to that.

Alternatively, I thought about the possibility of using pitch recognition on another vocal track (e.g. one I record myself) to recognize the vibrato and "transfer" it to the sample I need vibrato on. But this is hypothetical, I have no idea whether something like this is even remotely possible.

  • Hmm, interesting. Ideally, you could have the original vibrato, just altered slightly to make it sound less like the original. The only thing I can think of is using a pitch-warping tool to apply it manually if it's possible, or to adjust the original vibrato. Or maybe you could just attenuate the original vibrato rather than removing it completely? – Marc W May 9 '17 at 23:55
  • @MarcW Do you have any tool for pitch-warping in mind? I have a graphic tablet, perhaps I could draw convincing curves with that (if some program allows that) - Yes, I reduced the vibrato of the original instead of removing it completely. But ultimately, I just need another "vibrato curve" with no obvious relationship to the original. If you play two notes together, where the vibrato (modulo the actual note) only differs by a constant factor, I believe this becomes very obvious to the listener. – Stefan Perko May 10 '17 at 13:33
  • Yeah, I understand your dilemma. Unfortunately, I don't know of any pitch-warping tool that is that customizable. I thought something like Melodyne would do it. But if I come across anything, I'll let you know. – Marc W May 10 '17 at 16:32
  • To understand correctly, you want a vibrato that follows the given Hz rate thats decided by the note of the singer? – frcake May 10 '17 at 17:20
  • @frcake One basically separates the actual pitch as a function of time (e.g. in cents, i.e. logarithmically) into "note + vibrato", i.e. the note meant (that's a constant) plus the deviations pitch-wise from this note (that's not constant). I want to switch out the "vibrato" part with something else. – Stefan Perko May 10 '17 at 20:47

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