When I go down low on an alto sax it plays in the higher register can only get note out if run fast Is there any way fix this?

Here are several possible reasons why your alto sax is playing in a higher register when you go down low, as well as potential solutions

Embouchure:

- Embouchure plays a critical role in producing the desired pitch on a saxophone. Ensure your embouchure is relaxed with bottom lip pulled down slightly.

- Practice articulating low notes slowly with focused air support to establish a consistent embouchure

Reed Strength:

- A reed that is too soft may play sharper in an higher register when excessive pressure applied. Consider trying medium - firm reed strengths better suited for alto sax's low pitch.

Broken Reed

- Inspect the reed carefully for any tears or cracks, especially near the tip- A small break alter the vibration of the reed causing intonation issues. Replace broken reed if necessary.