Trumpet
The trumpet is a harmonically tuned instrument typically designed to play music written in 12edo. In a standard trumpet, this is achieved by a root pitch within the harmonic series, and three valves, which respectively lower the pitch by either two semitones, one semitone, or three semitones. By combining the three valves, the trumpet can semi-accurately play notes in 12edo (with a basis of a certain Just intonation due to its reliance on the harmonic series).
Certain notes (especially notably, the low C# or Db) have poor tuning due to this design and must be adjusted with a trumpet's adjustable valve tuning slides. For most trumpets, all three valves can be retuned; the first and third can be retuned in real time.
While the trumpet is generally designed for 12edo, there are several ways to play in other tuning systems - by custom trumpets (generally quartertone trumpets), non-standard fingerings, adjusting tuning slides, or by pitch bending via embouchure.
Custom trumpets and quartertone trumpets
There is a relatively short history of trumpets designed for the purpose of playing in extended tuning systems. The most popular microtonal trumpets are quartertone trumpets, which have a history of use in jazz and maqam.
History in popular music
Don Ellis was a big band jazz musician and trumpeter. He was one of the first to use quartertone trumpets, which was created by Holton. The trumpet used four standard button valves; the first three unchanged, and an additional fourth valve used to lower the pitch by a quartertone (the smallest interval in 24edo). Ellis was active through the 1960s and early 1970s until his death. His music is normally designed for 12edo, but he often employed microtonality in his improvised solos.
Ibrahim Maalouf is an active French-Lebanese jazz musician and trumpeter known for combining Middle Eastern folk with modern jazz music. His father, Nassim Maalouf, is credited with inventing a quartertone trumpet, which both he and Maalouf used. Ibrahim often uses his quartertone trumpet to play Arabic maqams in his jazz music.
Commercial quartertone trumpets
While uncommon, there are quartertone trumpets available for purchase or commission.
The Adams A4 is a jazz trumpet which can be ordered to include a quartertone valve. Other Adams trumpets sometimes include a quartertone option.
CarolBrass also sells commercial quartertone trumpets.
Ibrahim Maalouf partnered with AJ Atelier des Cuivres to commercially sell the "TOMA trumpet," a quartertone trumpet which Maalouf now uses exclusively.
Professional-grade trumpet "techs" are known to have created rotary valves which attach to the main tuning slide that lower the pitch of the trumpet by a quartertone.
Pujé trumpets are built with directly adjustable slides on the main tuning slide. According to Brent Peters, however, the slide is "hard to use accurately and quickly enough" [to play quartertones], "even with a trigger."
19edo trumpets
Stephen Altoft and Donald Bousted created a trumpet project titled "The Microtonal Trumpet," creating microtonal trumpets using rotary valves which can play in 19edo and 24edo.
Other
Vasilis Nalbantis created a xenharmonic trumpet, the "Nalbantis," designed to play maqams. Unlike other trumpets listed, the additional button is pressure-sensitive, allowing for more pitches, but less pitch accuracy, when playing the trumpet. The button changes the length of the tuning slide.
Other methods of xenharmonic playing
A custom trumpet is the best and easiest way to play xenharmonic music; however, it certainly isn't always a practical option.
Quartertones
Quartertones for most notes can be approximated well with alternative fingerings and the third valve slide.
Refer to the fingering chart (starting at middle G and ascending):
| Note | Fingering |
|---|---|
| G | 0 |
| Gt | 23 (S) |
| G# | 23 |
| G#t | 3 (S) |
| A | 12 |
| At | 123 (S) |
| A# | 1 |
| A#t | 13 (S) |
| B | 2 |
| Bt | 23 (S) |
| C | 0 |
| Ct | 3 (S) |
| C# | 12 |
| C#t | 13 (S) |
| D | 1 |
| Dt | 23 (S) |
| D# | 2 |
| D#t | 3 (S) |
| E | 0 |
| Et | 13 (S) |
| F | 1 |
| Ft | 123 (S) or 23 (S) |
| F# | 2 |
| F#t | 13 (S) or 3 (S) |
| G | 0 |
The (S) signifies that use of the third valve slide is necessary.
Other xenharmonic music
Retuning valves
On most trumpets, you can play EDOs lower than 12 by retuning each valve slide. Because each valve's tubing is adjustable, you can lengthen the tubing so each valve lowers the pitch by however many cents are in the number of semitones the valve targets. For an example, 10edo's semitone is 120 cents; adjust the second valve (one semitone) from 100 cents to 120, the first valve (two semitones) from 200 cents to 240, and the third valve (three semitones) from 300 cents to 360.
This method can be done similarly on quartertone trumpets; however, usually, the quartertone valve tubing (50 cents) cannot be adjusted.
Keep in mind that this retuning is often much less accurate the lower your pitch is, because trumpets are built on the harmonic series and tuning systems with a poor 3/2 will now have a perfect 3/2, and notes below middle G will be based on that perfect 3/2. You can fix this in real-time by "lipping" the notes.
Lipping
A common way to bend pitches on trumpet is to "lip" the note - effectively moving your embouchure to crudely target a pitch other than the speed of air and tubing length would otherwise allow. This method can be used to play xenharmonic music and is often used in conjunction with other methods of playing xenharmonic music.
External links
- The Microtonal Trumpet, by Stephen Altoft, Donald Bousted — extended techniques, 19edo trumpet
- The Microtonal Trumpet (2007-2016, archived)
- The Microtonal Trumpet on Microtonal Projects' BLOG (2017-2022, archived)
- Double Bell Trumpet (2007-2014, archived), by Marco Blaauw — quartertone (24edo) trumpet
- Microtones on The Modern Trumpet, by Nathan Plante — extended techniques, quartertone (24edo) trumpet