For a while I’ve been trying to think of double whistle concepts that would allow you to play a single melody line but spontaneously add in any harmonization you want wherever you see fit, without having to reposition your hands. I’ve started a couple of threads describing complicated ways of doing this that would be nightmarish to manufacture due to complex keywork and other factors.
But then I thought of a triple whistle design that is so simple that I’m sure I can’t be the first person to have thought of it, and it accomplishes the exact same thing, without any annoying keywork or overengineered nonsense. This design would simply have a center whistle that is fingered just like a normal whistle, with two additional “drone whistles,” each covering half a scale. You would use your two thumbs and two pinkies to control two drone whistles, which you could choose to play (or not play) at any time based on your lip positioning/angle (much like a double recorder). The whole design could be manufactured relatively easily, I would think.
This design would allow for basically any harmonization you wanted - a full scale (with Cnat instead of C#) could be played on the two “drone whistles.” But the main melody whistle - the center whistle, that is - could just be a normal whistle, with the normal range. So you could theoretically play with two independent melody lines, each with full range. Or, more likely, you’d use the drone whistles sparingly for occasional self-accompaniment, much the way violins and concertinas do. Of course, you could also simply use the drone whistles to play a constant drone, but you could change the pitch of the drone whenever you wanted.
This design would also allow you to play several triads by blowing all three whistles at the same time. Specifically, with no half-holing (but with cross-fingered Bb and Cnat), you could play:
- D major triad
- E minor triad
- E diminished triad
- F# minor triad
- F# diminished triad
- G major triad (second inversion)
- G minor triad (second inversion)
- A minor triad (second inversion)
- A major triad (second inversion)
- B minor triad (first inversion)
- C major triad (first inversion)
- C# diminished triad (first inversion)
Here’s roughly what the design layout would look like (actual hole positions could be modified for optimal tuning/ergonomics):

Here’s the finger chart for the right-hand drone whistle:

And here’s the finger chart for the left-hand drone whistle:

What do you guys think? Has this been done before? Is there some reason this wouldn’t work?
The only part that seems iffy would be making Cnat and B both work on the left-hand drone whistle. But even if you couldn’t get Cnat to work, you’d still have a range of D to B on the drone whistles, which would be amazing.

