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to_the_sun

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to_the_sun last won the day on December 4 2015

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  1. Also, like you were saying about cadence and timing, I've already written and am perfecting a program that determines your rhythm, and it's true that shaky or off-key notes are rare when you're in a good rhythm. So a lot of what I'm doing now is just a matter of fine-tuning.
  2. Thanks MDEW, those are exactly the sort of expert insights I was looking for. I suppose there is no one thing that determines the "important" moments in a vocal melody. I think onsets in volume play a greater role that I was originally thinking. Like you said, the beginning note of the phrase and perhaps others that are emphasized. It's the smooth melismas that will be the trickiest to identify.
  3. Thanks for all the responses. Most pitch tracking methods will isolate/estimate the fundamental and use that, however I could take partials into account with an FFT analysis or the like if necessary. I don't think it will be though, for now at least. Yes, I should specify that what I mean is "out of key". The subjective nature of music is fascinating to me and I understand that a key is a completely relative thing. I intend to acquire the scale being used at any given time heuristically, as the singer goes along, by assembling every frequency reading into a graph. This reveals a sort of "spectrum" unique to each scale and is sensitive to things like just tuning or intonation drift. For example, this image is of the "spectrum" of one of my test songs which is in C minor. From there I need to determine key moments at which to compare the current frequency reading with the peaks in the "spectrum", deriving a rating based on a sliding scale of proximity, not as a black and white matter of being in key or out of key. Would you agree with my intuition that the moments when tuning matters most are the moments of relative stability in pitch?
  4. I’m interested in doing real-time analysis on vocals in order to rate how "in tune" they are, using a programming language called Max/MSP, which I've been working with for a couple of years now. Something that’s sophisticated enough to be able to point out when the singer hits a wrong note. I'm on this forum to address a more basic question before I can begin and that's how exactly to quantify "when the singer hits a wrong note". How would a singing professional, like a vocal coach, define a missed note? I'm talking as far as pitch only, not tempo or anything. It may seem like an obvious question, but it's really not. There are plenty of programs out there already that detect pitch and perhaps compare it to a reference melody in a karaoke sort of fashion, but that’s not exactly what I’m asking. My question is: how does one take completely freeform input and decide if there are mistakes in it? As a test, I thought I could use a clip of some a cappella singing, something professional that definitely doesn’t have any off notes. However when I run my pitch tracking analysis on it, it seems that the singer spends an equal amount of time in the gray area between pitches as near or directly on them. I suppose this is because the singer’s voice slides all over the place and rarely stays completely stationary for long. So what exactly makes a note sound bad, when a skilled singer is using vibrato and sliding through all sorts of off key pitches all the time anyway? My hypothesis is that it’s the moments that the pitch does stay stationary that count; the mind doesn’t really pin anything down as being on or off key as long as it keeps moving. Kind of like how you can vibrato your way out of a shaky landing at a pitch and still make it sound alright. Is this a sound assumption to make? Any other insights into these questions?
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