Here are the steps to transpose music for alto saxophone:
1. Identify the key of the original music.
2. Lower the written notes by three flats (or three half steps) for each note in the original music.
3. Rewrite the music in the new key.
For example, if the original music is in the key of C, you would lower all the notes by three half steps to transpose it for alto saxophone. This would result in the music being in the key of A-flat.
Here is a table showing the transposition intervals for alto saxophone:
| Original Key | Transposed Key |
|---|---|
| C | A-flat |
| D | B-flat |
| E | C |
| F | D |
| G | E-flat |
| A | F |
| B | G |
By following these steps, you can transpose music for alto saxophone and play it in the correct key.