New Joe Kennedy C Full Set

[Sam L]

Well, I do have a recording device (me phone) and this is a short clip of; first a large metal cap, then mouth cap. Exactly the same chanter position and reed etc.

http://www.hunterpipes.co.uk/Sounds/differentcaps.mp3

Admit that it's an extreme example but it does demonstrate the principle. Unless you have cloth ears.

Also, as an aside, the volume of the cap can kill back D on a metal cap. For our chanters 5.5" is fine, 5" is a killer, as far as I am aware every time. This of course applies to the exact tube we've used.

This has happened twice to Peter, and once to me. Remembering what P had told me I swapped the cap and back D was fine again.

[Sam L]

Also, and before anyone jumps on me I know this isn't exactly the same, if you blow out through a single reed instrument (a good ol harmonica) and change the volume of the cap (yer gob) you will hear the tone change dramatically.

If I turn a wooden cap real thin, then I get to hear more of the physical sound of the reed operating - I'd say up at 4-5k upwards. This being of course a separate deal to what I've already mentioned.

FWIW Peter originally disagreed with me that cap volume affects tone. I think he's now undecided.

edit for bad syntax

[fiddlerwill]

hmm, how would you calculate the correct length top in relation to the 3 standing waves?

[rorybbellows]

Interesting results alright,I wonder if its just a nuance of your particular chanter.
Heres my latest cap and again no difference in tone or tuning, its four inches long , the shortest I could make it without squashing the reed.
I know its unfair that I have no recording but I'll try . My daughter has a vodophone smart 2. She can record but how do I upload it on to the net.



RORY

[MTGuru]

how do I upload it on to the net.

You could put it on Box.net or Soundcloud, Rory (free accounts). Or some other server.

[rorybbellows]

You could put it on Box.net or Soundcloud, Rory (free accounts). Or some other server.

Thanks, I'll get my technical advisor(daughter) on to it.
Lets say for the moment that the volume before the reed makes a difference , anyone know why it makes a difference ?
The next question would be do the waves in the chanter and the waves in the chanter head interact, I think not. I think the reed as an type of vibrating pressure valve where a wave goes one way into the chanter and another in the area before the reed but they dont interact.
My experiment results so far seem to differ from Sam,s ,is there any other way to demonstrate if there's interaction or not ?

RORY

[an seanduine]

OK Rory. You're going to want to read this:http://www.tuftl.tufts.edu/musicenginee ... n_reed.pdf
I believe this was done by one of the bright young men behind the Boston Pipeworks.
This sort of research requires some expensive kit so not too much has been done yet. Naturally when Yamaha start churning out resin cast copies of Coynes and Egans. . . .
A good question is the one you asked about interaction of the side of the wind cap to the reed. As was observed, the reeds have vibrational modes which are tantalizingly like the actions of some chladny plates. My guess, is that the interaction with the windcap is secondary to the interaction with the standing wave in the bore. Maybe even a poor third in a field of two. . .

Bob

[Cathy Wilde]

Speaking of Boston Pipeworks ... does anyone know the basic reed specs for one of their concert chanters? I have a friend in need.

[rorybbellows]

OK Rory. You're going to want to read this:http://www.tuftl.tufts.edu/musicenginee ... n_reed.pdf
I believe this was done by one of the bright young men behind the Boston Pipeworks.
This sort of research requires some expensive kit so not too much has been done yet. Naturally when Yamaha start churning out resin cast copies of Coynes and Egans. . . .
Bob

Its great that proper research is being done specifically for the Uilleann pipes and they are willing to share it. Pipemaker ,of course have loads of experience but conclusions based on experience are not always right. As Sam pointed out Peter Hunter is now undicided if the size of the chanter head makes a difference, this says to me that a conclusion would be based on opinion ,but opinions can be wrong.
Heres Michael Faraday's(one of the greatest scientists who ever lived) advice on experimentation.Just swap the word scientist to pipemaker.
"Faraday stressed that the scientific method demanded intellectual honesty. He worked to require scientists to submit their results for the critical appraisal of their colleagues to winnow out the personal or ‘observer-effects’ from objective, natural phenomena. Today this process is called peer review. He argued that scientists must always keep in mind that humanity makes all people, including scientists, to be active promoters of error due to our preconceptions. Faraday maintained that scientists need to understand that objectivity requires observers to be aware of the effects of emotions and desires on their observations and conclusions, lest they see the world more by the projections of their own hopes and fears than by reality.

RORY

[Driftwood]

All this talk of "three" standing waves has got me confused -Help!

I'm not an expert but I read somewhere that a standing wave has two main components: the source wave and the return (reflective)wave. Is that right? So, if there is a standing wave in the chanter top and another in the chanter itself then that makes two of them, right?

Also, if there is a standing wave in there then I suppose it must have nodes and antinodes and all that stuff as well.

[Brazenkane]

Kennedy sounds


https://www.box.com/s/0rnhw0bdqtxxgzt2y9am

[mke_mick]

Bravo! Both to yourself and to Mr. Kennedy - clearly this set is in exactly the right hands.

--Mick

[PhilD]

Very nice! Congratulations to the piper and his pipes. Thanks for sharing.

[geoff wooff]

Yes, very nice!

[brescianimichele]

Very good, both pipes and piper