Paul Desmond had a very soft alto sax sound that was unique due to the air (breath) tonal quality. The following might be considered in getting close to his sound.

Bring up PROGRAM MENUS.

Click on SOUND EDIT

Click on TONE

Under SOLO, 1st should be ON

GROUP I, TONE NAME: Vib. Alto Sax, LEVEL 116

SOLO 2nd, 3rd and 4th should be OFF

Use the side button and click SOLO 2nd ON and bring up GROUP M

In GROUP M, find WHITE NOISE. Bring LEVEL to 15.

The LEVEL can go higher than 15 to perhaps as much as 22 if you want more air escaping around the tone. Personally, I wouldn't go higher than 15.

SOLO 3rd and 4th should remain OFF.

Don't forget to name and save the sound. GOOD LUCK.