4 ms·

Some people can do this with their vocal cords. Sometimes it’s more than 2 notes. https://en.m.wikipedia.org/wiki/Overtone_singing https://en.m.wikipedia.org/w

Some people can do this with their vocal cords. Sometimes it’s more than 2 notes. https://en.m.wikipedia.org/wiki/Overtone_singing https://en.m.wikipedia.org/wiki/Overtone_singing

jacquesm 3y ago
Such as Anna-Maria Hefele: https://www.youtube.com/watch?v=vC9Qh709gas https://www.youtube.com/watch?v=vC9Qh709gas
- FpUser 3y ago
  This sounds more like applying resonant filter to one of the harmonics. Voice is not a pure sine hence contains "many notes". Some of what singer from Laybach does sound 2 voice as well. In some cultures this style is a natural.
  - jacquesm 3y ago
    It doesn't sound like that to me at all but tbh I haven't done any spectral analysis of what she's doing. But the steps she shows are very hard to do with just filtering without losing a lot of output volume and that doesn't seem to happen. It sounds like the overtones are added rather than filtered out. I'm also unaware of how you'd do the filtering from a physics perspective, unless she's able to somehow restrict certain modes from forming through muscle action.
    - praptak 3y ago
      She has a video with a spectral analyser, YT search something like "overtone singing spectral analysis".
    - deleted 3y ago
      [deleted]
    - matheist 3y ago
      > I'm also unaware of how you'd do the filtering from a physics perspective It's the same thing we do when we shape our mouths to make different vowel sounds, only much more precise. The physical thing that underlies what we perceive as "vowel quality" is the frequency of spectral peaks ("formant" is the linguistics terminology). When we shape our mouths (more generally our vocal tracts) to say "aaa" versus "iii" we are creating resonances at certain frequencies. Admittedly when creating vowel sounds the bandwidth of the resonator is pretty wide, and when we hear vowels we can still perceive "a" quality vs "i" quality with even a wide bandwidth. What Anna-Maria Hefele and other overtone singers do is much more precise. They can get a very narrow bandwidth by controlling their vocal tracts more precisely.
  - srcreigh 3y ago
    It’s not just sound, it’s literally entitled overtone singing. FYI for anybody. Your A440 is not the only frequency. There’s every integer multiple (880, 1320, etc) as well. Different coefficients of those overtones are why you can sing “ahhh” and “eeee” at the same note but they sound different. Polyphonic overtone singing is a technique where one or more overtones are heavily emphasized in the timbre. This is also why major 3rds on pianos are noisy. A4 has a C# as it’s 5th harmonic at 2200Hz (5*440). But C#5 (A4s major 3rd) on piano has a 4th harmonic (two octaves up) slightly higher at 2217.48. That’s why if you listen close there will be a ~17Hz oscillation around C#7 when you play A4 and C#5.
unforeseen9991 3y ago
I've learned to do this, it took quite a bit of time to control. I used to drive 3 hours round trip each day to and from work for years, and often used an hour or more of the trip to practice. It's extremely calming and I have a weird side effect that when I stop, I can still hear it "in my head" - it's pretty cool actually.

Some people can do this with their vocal cords. Sometimes it’s more than 2 notes. https://en.m.wikipedia.org/wiki/Overtone_singing https://en.m.wikipedia.org/wiki/Overtone_singing

jacquesm 3y ago

Such as Anna-Maria Hefele: https://www.youtube.com/watch?v=vC9Qh709gas https://www.youtube.com/watch?v=vC9Qh709gas

FpUser 3y ago
This sounds more like applying resonant filter to one of the harmonics. Voice is not a pure sine hence contains "many notes". Some of what singer from Laybach does sound 2 voice as well. In some cultures this style is a natural.
- jacquesm 3y ago
  It doesn't sound like that to me at all but tbh I haven't done any spectral analysis of what she's doing. But the steps she shows are very hard to do with just filtering without losing a lot of output volume and that doesn't seem to happen. It sounds like the overtones are added rather than filtered out. I'm also unaware of how you'd do the filtering from a physics perspective, unless she's able to somehow restrict certain modes from forming through muscle action.
  - praptak 3y ago
    She has a video with a spectral analyser, YT search something like "overtone singing spectral analysis".
  - deleted 3y ago
    [deleted]
  - matheist 3y ago
    > I'm also unaware of how you'd do the filtering from a physics perspective It's the same thing we do when we shape our mouths to make different vowel sounds, only much more precise. The physical thing that underlies what we perceive as "vowel quality" is the frequency of spectral peaks ("formant" is the linguistics terminology). When we shape our mouths (more generally our vocal tracts) to say "aaa" versus "iii" we are creating resonances at certain frequencies. Admittedly when creating vowel sounds the bandwidth of the resonator is pretty wide, and when we hear vowels we can still perceive "a" quality vs "i" quality with even a wide bandwidth. What Anna-Maria Hefele and other overtone singers do is much more precise. They can get a very narrow bandwidth by controlling their vocal tracts more precisely.
- srcreigh 3y ago
  It’s not just sound, it’s literally entitled overtone singing. FYI for anybody. Your A440 is not the only frequency. There’s every integer multiple (880, 1320, etc) as well. Different coefficients of those overtones are why you can sing “ahhh” and “eeee” at the same note but they sound different. Polyphonic overtone singing is a technique where one or more overtones are heavily emphasized in the timbre. This is also why major 3rds on pianos are noisy. A4 has a C# as it’s 5th harmonic at 2200Hz (5*440). But C#5 (A4s major 3rd) on piano has a 4th harmonic (two octaves up) slightly higher at 2217.48. That’s why if you listen close there will be a ~17Hz oscillation around C#7 when you play A4 and C#5.

unforeseen9991 3y ago

I've learned to do this, it took quite a bit of time to control. I used to drive 3 hours round trip each day to and from work for years, and often used an hour or more of the trip to practice. It's extremely calming and I have a weird side effect that when I stop, I can still hear it "in my head" - it's pretty cool actually.