Step 1: Rest the baritone across your lap so the bell faces upward and the mouthpiece receiver points toward you.
Step 2: Carefully twist the mouthpiece to the right into the mouthpiece receiver.
Step 3: Place your right thumb in the thumb ring. Rest your fingertips on the top of the valves, keeping your wrist straight. Your fingers should curve naturally.
Step 4: Place your left hand on the third valve slide or on the tubing next to this slide. Lift the instrument up toward you.
Step 5: Be sure you can comfortably reach the mouthpiece. Hold the baritone as shown above.