Terry McGee wrote: ↑Mon Aug 21, 2023 1:35 am
Now, if you're advocating for quena, David, you can probably play them!
I saw a group called Yuraj Marka at the Edinburgh festival perhaps 30 years ago and they let me have a go on all their instruments afterwards, which was totally unexpected - super bunch of people. The quena's holes were so big that I couldn't cover them all properly, but the sound it produced was astonishing. You can't buy that kind of quality from a distance, so I finally had a go at making my own last year and I've gradually worked out through making a host of tiny modifications how to get them more or less right, and also how to play them properly. One interesting thing about the shape of the wedge is that you can stick blu-tack along the sharp edge to blunt it and it still works: some configurations where the edge is replaced by a more vertical wall make it sound like a standard flute. The thing I've struggled most with is playability when switching between the lowest and higher octaves, because finding a position that works for both is hard, but the angle of the wedge seems to have a role in that. For the low octave, you try to blow a jet of air down the internal surface of the wedge, while for the higher octaves you aim it up the external ramp of the wedge. You probably want both surfaces aligned with where you can blow the jets from a fixed position, but that may vary from one player to the next, so at the moment I'm just trying to find the best angle for me. I'm finally getting somewhere with this and can now play the quena as fast as I can with whistles, but there's still room for improvement as one of the worst quena's I've made is the most playable. (It sounds terrible due to its octagonal bore - it was a materials test to see if flutes can be made entirely out of epoxy.)
...the bottom end featured a reduction in bore diameter in the form of a smaller hole through what would otherwise have been a closed node.
I'm still trying to work out what impact that restriction at the end makes. It may affect the notes of the third octave, but it's hard to tell as I'm moving the holes quite a bit to reduce the amount of stretch needed, and on the standard size quena in G I'm using fingers 1, 2 and 4 on each hand to cover the holes instead of 1, 2 and 3 - this turns out to be easy to adapt to as you can treat fingers 3 and 4 as a single unit and move both at the same time, so it doesn't affect the playing of whistles either, and you adapt easily to both systems when half-holing. I have to use non-standard fingerings for lots of the 3rd octave notes though, so moving the holes away from traditional locations is disruptive.
Well, wasn't I disappointed when I finished it, put it up to my lips and couldn't get a note out of it. Fortunately, I didn't hide my shame, I showed it to the young lady who was the main player of the instrument in the main local band. She admired its appearance, put it to her lips and played a storm. She was delighted. I was non-plussed. I tried it again, not a cracker.
Well, often when I've made little adjustments to the wedge I've had to relearn how to blow to get sound out of the instrument - I often think I've destroyed it with a tweak which leads to the next attempt to play it generating nothing but hiss, but then find a new position that works, and sometimes it's an improvement, while other times it's worse. I often have to shorten that end of the tube so that I can have another go at reshaping the ramp, and the pitch of the quena gradually goes up due to this shortening as I improve it, which is why I always start with it half a tone flat, and all the tone holes a bit flatter still. Once it reaches the right pitch, I stop and just accept that that's as good as that one will get, then I tune all the holes properly. Each time I gain a better idea of what to start with on the next one. Unfortunately, I've never had a good quena to copy the shape from, so it's taken a lot of experimentation.
Any secrets you can pass on? For example, are you conscious of where you are directing the air. Is it at the wedge shaped edge, or more downwards or other?
I suspect the jet should travel parallel to the internal or external wedge surface, but I have no way of measuring what's actually happening. The distance you blow towards it from can vary, but seems to be better closer in where the jet is less turbulent, just so long as you don't get too close and block the window excessively. I've discussed this with one of the top quena makers (Domingo Uribe) and there don't appear to be any hard rules about it - different players prefer different geometries, so a lot of it may depend on mouth and lip shapes and muscle structures. Ideally you make an instrument for a specific player, though if you go for the average player you'll get something most people are happy with, and that suggests something around 10mm window width, 8mm window length, but beyond that the information becomes hard to get firm answers on, so I have to go by my own experiments. I suspect a ramp angle of 40°may be close to optimal with both ramp surfaces (internal and external) at 20°, but any of those values could easily be out by 10. If you have figures for yours based on the best instrument the South American players had, I'd love to hear them.
And any secret to pressing it to your face? I couldn't seem to find a location where I could cover the end, while being anywhere near a place where I could blow in a credible direction. Maybe bony-chinned people shouldn't play Quena?
That's something I find uncomfortable too, so I'm thinking of putting in a plate to cover the lower half of it, perhaps with the top of the plate curving inwards so as not to get in the way of the lower lip. They have a plate on the bigger quenachos which the chin can't block without such assistance, but it's extra work having to add pieces to an instrument where the normal manufacturing process is entirely subtractive. You do have to press the end of the quena in hard enough to plug any leaks because the slightest gap will turn the sound to hiss, and that pressure pinches the skin under the lower lip between the hard end of the instrument and the base of your teeth, which is far from ideal - it limits the amount of time I can play the instrument in a session, and you don't want to go around with a red ring on your lower face where the skin's been crushed. A plate should resolve that.