Alto and tenor clef use the same sign, the C clef, and one rule: the line the clef points at is middle C. In alto clef that is the middle line. In tenor clef it is the fourth line from the bottom. Learn that one note, add two or three landmarks, and read everything else by step or skip from them.
01 One sign, one rule
The C clef looks like a bold letter B: two upright bars and two curves that meet in a point. Wherever that point sits, the line through it is middle C, written C4. The sign can slide up and down the staff, so the rule is always the same and only the line changes. Composers move it so that a part fits on the staff with as few ledger lines as possible.
Two more positions turn up in older editions and early music. On the bottom line the same sign is the soprano clef, on the second line the mezzo-soprano clef, and on the top line the baritone clef. The rule still holds. Read middle C where the clef points.
02 Alto clef: middle C on the middle line
The viola reads alto clef, and so does the alto trombone. Its lines, bottom to top, are F, A, C, E, G and its spaces are G, B, D, F. On a viola, the open strings land on easy landmarks. The C string hangs below one ledger line under the staff. G is the bottom space, D the space just above middle C, and A sits just above the top line.
03 Tenor clef: middle C on the fourth line
Cello, bassoon and tenor trombone read bass clef most of the time. When a part climbs high enough to need several ledger lines, it switches to tenor clef. Its lines are D, F, A, C, E and its spaces E, G, B, D. Every line and space reads a third lower than it does in alto clef, because the C has moved up a line. Cellists get two free anchors: the open D string is the bottom line and the open A string is the middle line.
Tenor clef is not what tenor singers read. Modern tenor parts are written in treble clef and sound an octave lower, often marked with a small 8 under the clef.
04 The landmark method, step by step
- Find the C. Before you read a note, find the line the clef points at and say “middle C”.
- Add two landmarks. In alto clef, take the top line (G) and the bottom line (F). In tenor clef, take the middle line (A) and the bottom line (D).
- Read by distance. From the nearest landmark, a line to the next space is one step (the next letter). A line to the next line is a skip of a third. Count “C, D, E” up from middle C, never up from the bottom of the staff.
- Check by sound. If you play an instrument, play the landmark first. Then play the passage and listen for a wrong turn.
| Clef | Line 1 | Line 2 | Line 3 | Line 4 | Line 5 |
|---|---|---|---|---|---|
| Treble | E4 | G4 | B4 | D5 | F5 |
| Alto | F3 | A3 | C4 | E4 | G4 |
| Tenor | D3 | F3 | A3 | C4 | E4 |
| Bass | G2 | B2 | D3 | F3 | A3 |
| Clef | Space 1 | Space 2 | Space 3 | Space 4 |
|---|---|---|---|---|
| Treble | F4 | A4 | C5 | E5 |
| Alto | G3 | B3 | D4 | F4 |
| Tenor | E3 | G3 | B3 | D4 |
| Bass | A2 | C3 | E3 | G3 |
05 Shortcuts from clefs you already know
If you read treble clef, alto clef is one letter higher than the same spot in treble, an octave lower. Treble’s bottom line E becomes alto’s F. Tenor clef is one letter lower than the same spot in treble, again an octave lower, so that E becomes D. From bass clef, tenor clef reads a fifth higher: bass G on the bottom line becomes tenor D. These shortcuts are useful for checking a note. They are slow for reading music, because every note becomes a sum, so use them while you learn the landmarks and then drop them.
06 Five minutes a day
- Say the lines. Out loud, bottom to top: F A C E G for alto, D F A C E for tenor.
- Name, don’t play. Take a slow tune in the new clef and name every note before you play a sound.
- Mix clefs. Once a clef feels steady, switch between it and the clef you already read. Real parts change clef in the middle of a line.
- Keep it short. Five minutes every day builds recognition faster than an hour once a week.
Related reading
Questions
How do you read alto clef?
Find middle C on the middle line, where the clef's two curves meet. The lines, bottom to top, are F, A, C, E and G, and the spaces are G, B, D and F. Read every other note as a step or a skip from one of those landmarks.
How do you read tenor clef?
It is the same C clef placed on the fourth line, so middle C is the fourth line from the bottom. The lines are D, F, A, C and E, and the spaces are E, G, B and D.
Which instruments use alto and tenor clef?
The viola reads alto clef most of the time, and so does the alto trombone. Cello, bassoon and tenor trombone read bass clef and switch to tenor clef for higher passages.
Is middle C the same note in every clef?
Yes. Treble, alto, tenor and bass clef all write the same middle C, C4. Only its place on the staff changes.