1. Tension of the drumhead: Increasing the tension of the drumhead will raise the pitch of the drum, while decreasing the tension will lower the pitch.
2. Size of the drum: Larger drums will produce a lower pitch than smaller drums.
3. Shape of the drum: The shape of the drum can also affect the sound. For example, a drum with a more rounded shape will produce a warmer, more resonant sound than a drum with a more angular shape.
4. Materials used to construct the drum: The materials used to construct the drum can also affect the sound. For example, a drum made of wood will produce a warmer sound than a drum made of metal.
5. Placement of microphones: The placement of microphones can also affect the sound of the kettle drum. For example, placing the microphones closer to the drum will produce a more focused sound, while placing them further away will produce a more ambient sound.
By adjusting these factors, it is possible to achieve a wide variety of different sounds from a kettle drum.