In 30 years of flute making I have observed this tension between old flutes versus faithful modern copies versus new directions. The flute world is hardly the only one. Same with other traditional instruments, the classical instruments, etc. and this is one of the things that drives the professional evolution of our designs.
Compare our flute world with violins, for instance. The ultimate desire for some is to own and play a genuine Cremonese instrument. Then again, how many can afford a Strad worth $750,000? So then there are all the copies ranging in various qualities and ages, some which are very nice. And quite expensive. But then there are several modern makers who are making trouble free and history free instruments - as well as trying out some newer ideas. And catering to modern needs and tastes and style.
For a while the old flutes were the only ones available and so that is what all the players went after, as there were no other instruments - and plenty of old ones. A bunch of us had to bootstrap and learn how to make these in the late 70s and early 80s and eventually we were able to make faithful copies of the old ones. But the labor involved to copy an 8 keyed instrument with all the keys was extreme, and some of us, myself included, couldn’t sell our flutes for what one could pay for an old Rudall or Pratten, and expect a decent wage. Fortunately, these old flutes became scarce compared with the demand. And when these old ones became collectible in an antique market, appearing and selling for higher prices in auctions such as Southbys, our attempts became more reasonably priced in comparison.
Rendering these old 8 keys into a keyless version was a fairly modern step. How many keyless original Prattens and Rudalls are out there? Many of us discerned that the keywork was not entirely necessary for many since the music is mostly played in D or G. So we were able to develop good copies but without these extra bells and whistles, including tuning slides. This should be recognized as an evolutionary step forward, not a reductionist approach to the past.
There are plenty of acoustical problems with the old instruments, originated from design, being designed for a different pitch standard originally, having been poorly tweaked at some point in the past, or just having suffered the ravages of time. It may be that the best examples were played hard and didn’t survive and the ones that did were the ones that played not so well or had other problems - and then got stuck in attics, in their more pristine conditions. I know of an old 18th century set of bagpipes made by Kennedy that was played every night. I once tried making copies of a pristine Egan from the same period and the chanter was impossible to reed. Not so with the Kennedy, which renders copies that are very forgiving to reed and play well. Thus there may be a rough relation between how beat up an instrument is with how well it plays, as an indication of how much and how easy it was to play. I have seen this phenomenon in some old flutes. Thus that perfect looking original Rudall with the flat bottom D may be perfect in looks simply because its original owner, frustrated by the flat bottom D, put the thing away and followed some other direction!
The old flutes are also not without some basic problems - especially in how they fit to smaller handed players. I’ve done much in my flute making to correct this by developing and offering instruments with holes much closer together than the originals.
The modern made flutes are not without their own idiosyncrasies - but the modern maker can usually adjust these to the players needs. Thus I always recommend getting a modern made flute over the old ones. The flutes are designed for our modern needs in mind and most of us are still around should problems arise.
Plus, catering to the modern makers will help us stay in business in these challenging economic times. These times are going to get worse unfortunately! Thus more the reason to keep buying from the living makers!
Casey