What to do if the baritone tone is too high?

If the pitch of a tenor instrument (typically referring to instruments like the euphonium/baritone horn or tenor saxophone, etc.) tends to be high, you can adjust and improve it from the following aspects:

**Check the Instrument Itself**  
- **Tuning Issues**: Ensure the instrument is properly tuned. Use a tuner to check the standard pitch (usually A=440Hz) and adjust the main tuning slide or mouthpipe length.  
- **Mechanical Problems**: Are there leaks in the keys, pistons, or slides? Leaks can cause the pitch to rise, requiring repairs or replacement of pads/piston oil.  
- **Mouthpiece Fit**: An unsuitable mouthpiece model (e.g., too small or shallow) may affect pitch. Try switching to a mouthpiece designed for tenor instruments.  

**Breath Control**  
- **Insufficient Breath Support**: High pitch may result from overly rushed or pressured airflow. Try using a fuller, steadier airstream with stronger abdominal support and reduced chest tension.  
- **Airflow Direction**: An upward airflow angle (e.g., on saxophone) can raise the pitch. Try slightly adjusting the airflow downward.  

**Lip and Oral Adjustments**  
- **Embouchure**: Tight lips or excessive biting can raise the pitch. Relax the lips, increase oral cavity space appropriately, and keep the jaw flat.  
- **Oral Resonance**: Maintain an "O" shape inside the mouth with a slightly lower tongue position to help lower the pitch and enrich the tone.  

**Alternative Fingerings or Positions**  
- **Saxophone**: Certain high-register fingerings can be fine-tuned using alternate keys (e.g., side keys or harmonic fingerings).  
- **Euphonium**: For sustained notes, slightly adjust piston depth or slide position.  

**Environmental and Psychological Factors**  
- **Temperature Effects**: High instrument temperature (e.g., in brass instruments) can raise the pitch. Warm up the instrument or let it rest to room temperature before playing.  
- **Nervousness**: Tension while playing increases lip pressure. Improve through slow practice and relaxation exercises.  

**Practice Methods**  
- **Long-Tone Exercises**: Practice sustained tones with a tuner, adjusting breath and embouchure until pitch stabilizes.  
- **Harmonic Exercises**: Use harmonic series exercises (e.g., for brass) to develop sensitivity to pitch.  
- **Recording and Review**: Record your playing to analyze specific pitch deviations in certain registers or notes.  

**Professional Assistance**  
If the problem persists, consult a professional instrument technician for an inspection or seek guidance from a teacher to correct playing techniques.  

Depending on your specific instrument type (brass/woodwind) and the register where the high pitch occurs, you can target the methods above accordingly. In most cases, a high pitch results from a combination of breath control, embouchure, and instrument condition, and systematic adjustments will lead to noticeable improvement.