Here's how to deepen your voice in Premiere Pro.
Step 1:
Go to Effects panel and search for "Pitch Shifter". Apply the effect to your audio clip.
Step 2:
In Effect Controls, locate the Pitch Shifter effect.
Step 3:
CLick Custom Setup Edit and adjust the Semi-tones to a negative number.
Step 4:
Play back your audio and fine-tune the setting until you achieve your desired deep voice effect.
Your voice is now deepened. Note: Start with small adjustments (e.g., -2 to -4 semi-tones) to maintain natural sound quality.