Just came my mind now, when weather (temperature/humidity)is changing terrible much here.Real temperature responsive bi-metal(or something)for traditional bridles/wiretype ,( not mean cobber or silver, which are most conductive heat exchanger!).
Perhaps the temp variety is not huge, that it can cause metal movements so ,that it can help tuning +living with canereeds different climates, BUT , perhaps somebody
could have a idea about new material for.
some have had sucess with brass, but its a b!tch to work with.
The bridle is meant to apply certain forces onto the reed - ie squeezing the sides of the bridle together will force the reed lips open. Therefore you need to use a material that can retain its shape (under force) yet be workable enough to have its shape changed. i suppose this is why copper has been the material of choice.
I know it doesn’t answer your question but its a starting point to think about what material is a suitable alternative.
well ,mean like metals what’s is used in springtype thermometers, the warmer it spread, the colder opposite way.So the bridle will perhaps set automatically proper tigth to keep reedlips good playing order without adjusting bridle by hand.
Don’t forget that cane goes through even wilder changes during these times…
yep yep..something what works with cane behavings 
isnt that against the laws of physics?
a metallic material that expands when cold/dry (presumably to open the reed aperture)
and contracts when warm /humid (closing the reed lips)
…or am i just scientifically ignorant and/or not getting this topic 
well, some bi-combounds…(I also mentioned “or something” not metals ).. can react oppositeway…
Like new runners shirts etc which remove moisture fom skin with different fibercomposition with capillar effect vs heat
Lenses which turn dark vs brigthness and vice versa. etc
But hey, don’t take it so seriously, just suggestion…
“Just small movement with bridle could be huge effect with tuning”, that’s the main point, I think all of us at forum agree this.
I don’t think it would be contrary to the laws of physics, but it would be difficult to engineer a material that was ductile, malleable, and still contracted sufficiently strongly in dry condtions to open the reed. The “bi-material” idea would be one way to achieve such strong forces with a thin material. It would need to be a sideways “opening” style bridle. I think you would not want it to be temperature-based, since wet+cold or hot+dry conditions would make it go haywire and possibly collapse or crack the reed.
regards
Bill
how about totally new construction… like gaita type bridle (yes I know, its not bellows blown),
yes, the old system with UP is easy cheap etc.etc.
but sometimes nice to trow up something what cames up mind
GHB maker Colin Kyo makes now chanters of laminated birchwood(?) with good results
As far as I know the gaita style bridle is made of a copper stripe or wire.
On the other hand I saw some time ago at a hardware store, a plastic wire, is green, is malleable like any metal wire but it´s plastic.
check arpha site pic,…sides tyied
A couple of years ago I posted the fact that I use galvanized steel for my bridles. Much more stable than copper and brass.
Go to any plumbing\furnace store and ask for scrap duct work. I found stuff that is around .020- .025 to be quite good.
All the best,
Pat Sky