Yamaha Trombones Owner's Manual - Page 9

Before Playing ■ Tuning the Instrument Slide the main tuning slide in or out to tune the instrument. Since temperatures have an effect on the instrument's pitch, blow some warm air through the instrument to warm it up before tuning. Adjust the length of the main tuning slide until you achieve the desired pitch. On trombones with double rotary valves, the levers can be used to change the pitch from Bb-F, Bb-G, or Gb (when a D attachment is used), Bb-Eb (when a D attachment is used). First Lever Main Tuning Slide About the rotary valve On trombones with a single rotary valve, engaging the valve with the lever will change the pitch from Bb to F. Bb F Second First Second Lever Rotary Valve Rotary Valve First Lever Second Lever Pitch X X Bb O X F X O G O O Eb O ... When the lever is engaged X .... When the lever is disengaged Using D Attachment Gb D Offset rotary valves First Lever Rotary Valve Rotary Valve Lever Second Rotary Valve First Rotary Valve Second Lever First Lever Second Lever Pitch X X Bb O X F X O (Bb) O O Eb O ... When the lever is engaged X .... When the lever is disengaged Using D Attachment D 23