I find it difficult to explain to the uninitiated the concept of “transposing” instruments. The what is confusing. The why is worse.
To get the what across, I usually have to resort to an example: “Okay, so it works like this. If I am playing an alto saxophone, and I see an F-sharp on the page, I think ‘F-sharp,’ and do the correct fingering for F-sharp, and then I blow into the instrument and an A comes out.”
Sometimes a visual representation is useful (here are transpositions for some common woodwind instruments):
Instruments | Written pitch | Sounding pitch |
---|---|---|
Piccolo | ![]() Down an octave |
![]() Up an octave |
Clarinet in E-flat | ![]() Down a m3 |
![]() Up a m3 |
Flute, Oboe (non-transposing) |
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Bassoon (non-transposing) |
![]() |
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Clarinet in B-flat, Soprano saxophone | ![]() Up a M2 |
![]() Down a M2 |
Clarinet in A | ![]() Up a m3 |
![]() Down a m3 |
Alto flute | ![]() Up a P4 |
![]() Down a P4 |
English horn | ![]() Up a P5 |
![]() Down a P5 |
Alto saxophone | ![]() Up a M6 |
![]() Down a M6 |
Contrabassoon | ![]() Up an octave |
![]() Down an octave |
Tenor saxophone, Bass clarinet | ![]() Up a M9 |
![]() Down a M9 |
Baritone saxophone, Contrabass clarinet in E-flat | ![]() Up an octave and a M6 |
![]() Down an octave and a M6 |
This system is, shall we say, “difficult:”
- Composer/arranger/copyist: “What was that transposition for alto flute again? A fourth, I think, but was it a fourth down or a fourth up? Or was it a fifth?”
- Conductor: “Let’s see, the alto saxophones have an E and a B, the tenor has a D-sharp, and the baritone has a D-natural. So that chord would be, um…”
- Educator: “Okay, everybody play a B-flat scale. I mean, ‘concert’ B-flat. So C for clarinets and tenor saxophones, G for altos and baritones, E-flat for English horn… or is it F for English horn?…”
- Gigging musician: “I need to buy the fakebook in E-flat. Hmm, and I guess I also need the B-flat, in case I play clarinet on anything. I wonder if I’ll need the C book for flute, too? Wait, let me make a phone call.”
(And that’s just the system used for the modern band and orchestral instruments!)