Dear Ladies and Gentlemen,
TL;DR: I came up with a cool alternative tuning in fifths although I found out I'm not the first one to have found it. Do you have experience with this tuning? I'm going to have such instrument made by Seydel and test it!
A few weeks ago I came up with an alternative tuning that I have never seen used in a chromatic harmonica before. It came to be during the time I was looking for an alternative to solo tuning. I was especially intrigued by diminished and augmented tuning, specifically their property of being highly key-agnostic: A scale can be played in any key using only one of three (dim.) or four (aug.) patterns, which means you can transpose by one or more thirds simply by starting from a different hole, whereas with other tunings like solo, classical or bebop each key is a bit different. This greatly flattens the learning curve and makes transposition much easier on diminished/augmented tuned chromatic harmonicas. However, these tunings come with a trade-off. With diminished tuning in addition to single notes you can only play minor thirds, diminished triads and diminished seventh chords, albeit in any key. While many (including me) would call that an advantage compared to solo or classical, I would argue that only having major thirds and augmented chords as it is the case for augmented tuning is rather limiting.
Now, are there any other instruments with the aforementioned shift-to-transpose property? Yes, most prominently stringed instruments like the violin or the cello. If you don't know, violins are most commonly equipped with four strings tuned G3, D4, A4, E5 and cellos with strings C2, G2, D3, A3, so they are tuned in fifths. One interesting aspect of this is that as long as the range of the instrument allows for it, the player can easily transpose a tune simply by starting from another string but the fingering stays the same.
How would the key table for a 14-hole chromatic harmonica look like, you ask? Starting from C, like this:
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
|----+-------+-------+-------+-------+----+----+----+----+----+----+----+----+-------+-------|
| b | C | E | G | B | D | F# | A | C# | E | G# | B | D# | F#/Gb | A#/Bb |
| b* | C#/Db | F | Ab | C | Eb | G | Bb | D | F | A | C | E | G | B |
| d | D | F | A | C | E | G | B | D | F# | A | C# | E | G# | B |
| d* | D# | F#/Gb | A#/Bb | C#/Db | F | Ab | C | Eb | G | Bb | D | F | A | C |
As you can see, the odd-numbered blow holes form a segment of the circle of fifths, namely C, G, D, A, E, B, F#/Gb. They are interspersed with major thirds in order to fit all half-steps in between. And if you look closely, you will see that you can play all major and minor triads as well as a all major seventh and minor seventh chords while still being able to play scales largely uninterrupted! To transpose a fifth, just shift two holes! In addition, this hypothetical harmonica covers the impressive range of C3 to C7 and sharp keys are relatively easy to play, which should make it very practical for classical cello and violin repertoire! There is still much much more to be discussed here regarding the comparison to dim./aug., patterns, transposition, etc., which you can read in my follow up post as soon as it's up!
That begs the question: Why haven't I ever heard about this? Why couldn't I find anything online even after intensive searching? But as it turns out,
I am not the first one to have come up with and publicly talk about this chromatic harmonica tuning. This award goes to streetlegal with his/her post
Tuning in Fifths[1] and oh boy, am I late to the party, that was in 2013! The only other intimately related post I found is from about 4 years later called
Spiral 5ths Tuning[2], again by streetlegal. AFAIK the most closely related tuning is
circular, which is similar but stays in one key instead of advancing through the circle of fifths.
Has anyone ever heard of such a harmonica actually in use? streetlegal, if you're reading this, how's it going? Have you ever gotten hold of a chromatic harmonica in such tuning?
In any case, I am going to order one from Seydel and let you know how it goes! It'll be a 12-hole harmonica starting from low C.
[1] https://forums.SlideMeister.com/index.php?topic=9024.0[2] https://forums.SlideMeister.com/index.php?topic=14802.0PS: I didn't use the built-in table because I think this one looks nicer.
