A transposing instrument is one whose written notes don't match the concert pitch that sounds. The alto saxophone is one of the most common. The rule for the alto is simple and fixed: it sounds a major sixth (nine semitones) lower than written. Read a written C, and the audience hears concert E♭. Read a written A, and they hear concert C.
That's why the instrument is called "an E♭ instrument": a written C produces the pitch E♭, the key the instrument is built around.
The most useful version of this for a rehearsal is the reverse direction — the band director names a concert pitch, and you need to know what to read. Add a major sixth:
| Concert pitch (sounds) | Alto saxophone reads |
|---|---|
| Concert B♭ | G |
| Concert E♭ | C |
| Concert F | D |
| Concert C | A |
| Concert A♭ | F |
| Concert G | E |
| Concert D | B |
The pattern never changes: the alto reads a major sixth above the concert pitch. Internalizing this table is one of the fastest ways to feel at home in a concert band or jazz ensemble.
Adolphe Sax designed the entire saxophone family — soprano, alto, tenor, baritone — to share one fingering system. Because each instrument is a different size, the same fingering sounds a different pitch on each. Writing the music transposed lets a player move between sizes without relearning a single fingering. The alto and baritone are pitched in E♭; the soprano and tenor are in B♭. So the alto and baritone read the same written notes — the baritone simply sounds an octave lower.
Because the alto transposes, every scale you practice has a written name and a sounding name. The fastest way to build fluency is to practice your twelve major scales in the instrument's own written pitch, hearing each note as it truly sounds. See the full alto saxophone fingering chart — every note with its written and concert pitch — or read the method behind mastering all twelve keys.
The alto saxophone is in the key of E♭. A written C sounds as concert E♭, a major sixth lower than written.
It sounds a major sixth — nine semitones — lower than written. To put a concert melody on the alto, write it a major sixth higher than it sounds.
A written G. Concert B♭ is a major sixth below written G, so playing G on the alto sounds concert B♭.
No. The tenor is in B♭ and sounds a major ninth lower than written. The alto and baritone are the E♭ saxophones; the soprano and tenor are the B♭ saxophones.
So the whole family can share one fingering system. Because each size sounds a different pitch for the same fingering, the music is written transposed — and a player can switch instruments without relearning the fingerings.
The Whole Horn plays all twelve major scales transposed to the alto's written pitch, with a play-along metronome — so you hear concert pitch while you read alto.
Open the scale trainer → Alto fingering chart