A transposing instrument reads music written at a different pitch than it sounds. The written part is shifted so the player’s fingerings stay consistent across the family, while a piano (a concert-pitch, non-transposing instrument) sounds exactly what is on the page. That mismatch is why a Alto Saxophone (E♭) playing from a piano’s sheet music will sound in the wrong key unless the part is transposed first.
Written → concert notes
What each written note sounds like at concert (piano) pitch on the Alto Saxophone (E♭):
| Written note | Sounds (concert) |
|---|---|
| C | E♭ |
| D | F |
| E | G |
| F | A♭ |
| G | B♭ |
| A | C |
| B | D |
Key-signature conversion (concert → written)
To turn a piano (concert) key into the Alto Saxophone (E♭)’s written key, move up a major sixth:
| Concert (piano) key | Written key |
|---|---|
| C major | A major |
| G major | E major |
| D major | B major |
| A major | F♯ major |
| F major | D major |
| B♭ major | G major |
| E♭ major | C major |
| A♭ major | F major |
Why the Alto Saxophone (E♭) is pitched in E♭
Instruments in a family are built in different keys so a player can move between them without relearning fingerings. On the Alto Saxophone (E♭), the same fingering that produces a written C sounds concert E♭; writing the part up a major sixth lets the player keep those familiar fingerings. For the pianist, the practical takeaway is the reverse: hand a Alto Saxophone (E♭) player your concert-pitch music transposed up a major sixth, or you’ll be a major sixth apart.
Alto Saxophone (E♭) transposition — FAQ
What does written C sound like on the Alto Saxophone (E♭)?
How do I transpose a piano part for the Alto Saxophone (E♭)?
What key is the Alto Saxophone (E♭) in?
Related
Conversions are computed from the instrument’s transposition interval using interval math, not a hand-typed table, so every enharmonic spelling is correct.