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 Post subject: voicing and form ratios
PostPosted: 17 Jun 2015, 19:16 

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Altho my posts do seem to spark an interest in exploring voicing designs, vessel shapes and ratios, I do wish to at least post this last test. Do remember at this stage of tests, no specific fundamental pitch was being sought.

What was sought was:
1. How short can a wind channel be
2. Can a successful wind channel be made that does not exit at the vessel’s interior wall
3. What might affect the sizes of the thumb holes.

This bamboo model has helped determine some of the above questions.
1. The wind channel can be short. The one example shown is 12 mm long.
2. The wind channel can be placed within its exit within the vessel . Have many successful examples of this.
3. Sizes of holes—regard the snaps
1. The rectangular shape allowed holes 6 ,7, 8. To be impossibly large. Surprisingly the 9th hole was small and would jump 225 cents!
2. After the right side was decreased, holes 6 and 7 had to be reduced (see epoxy), BUT hole 8 had no change in pitch.
3. Decreased top left of vessel allowed hole 8 became in pitch, but because the hole is still so large hole 10 is not as good as I should like.

So today I will cut the lower left side of the ocarina to further decrease the vessel’s interior and see it that “changed” shape is will allow hole 8 become smaller.

There is no reason to make an ocarina as this, but I do wish for information about the forms ratio and its effect on the size of the fingerholes. Then of course I might better understand making a more consistent pitched instrument.


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 Post subject: Re: voicing and form ratios
PostPosted: 18 Jun 2015, 08:29 

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Ciao Andy.
Intervengo in termini generici:
-ogni forma di ocarina richiede le proprie ottimizzazioni. Queste si ottengono solo insistendo con quella forma;
-non tutte le conformazioni sono adatte per ottenere un'ocarina efficiente, ad esempio nella foto n. 3 si nota il foro del pollice sinistro smisurato rispetto a quello destro. Posto che lo schema diteggiatura sia di tipo orientale, il sistema "Soffre" palesemente sul lato sinistro, perchè non "Sente" la nota sul foro del pollice sinistro.
Un sistema di ocarina trasversale efficiente è costituito da un ambiente il più possibile raccordato intorno alla finestra, fuso ad un'appendice periferica di conformazione più o meno conica. Questo perlomeno nel range Alto/Tenor.


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 Post subject: Re: voicing and form ratios
PostPosted: 18 Jun 2015, 15:50 

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I've heard that too short a windway can cause turbulence issues. Basically an air sound. Do you find this happening or note no change?


Please visit by Facebook page so that you can stay updated on my progress.
http://www.facebook.com/spiritwind.ocarinas

My website http://spiritwindocarina.com/


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 Post subject: Re: voicing and form ratios
PostPosted: 18 Jun 2015, 16:13 

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Personalmente, trovo che il canale dell'aria accorciato è molto utile nelle ocarine contrabbasso, aumentandone la prontezza di risposta. Sulle Alto C bisogna mantenerlo lungo almeno 4 centimetri. Se non funziona aumentarne la lunghezza fino a 6 centimetri.


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 Post subject: Re: voicing and form ratios
PostPosted: 18 Jun 2015, 20:52 

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I've found that lower keyed instrument do well with a shorter windchannel. but 60 mm for a c? wow, the way I make things a wind cahnnel that long would cause me too many problems, the turbulence that Jordan suggests. In fact to Jordan's questions on voicing, have you tried widening the blowing end of your channel?

In fact on my clay "c" whatever (I call it tenor), I'm having interesting trials with opening the blowing end, thus shortening even more the channel..The increased volume of air makes spectacular differences in playing. At first I thought the timbre to be rather rough, crude, now, no.

more work is to be done and the local backyard shale is being slaked, but no one would work outside in the 98+ degree heat.


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 Post subject: Re: voicing and form ratios
PostPosted: 18 Jun 2015, 22:06 

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Yes I have been experimenting with both widening and thickening the entrance to see which produces the best tone. I am having mixed results though. It seems that right around 2mm thick is where I start to hit turbulence issues. Width seems to help power give more power to the ocarina so I find widening it some helps.


Please visit by Facebook page so that you can stay updated on my progress.
http://www.facebook.com/spiritwind.ocarinas

My website http://spiritwindocarina.com/


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