Tuba: The tuba can create a deep, ominous sound that is often associated with suspenseful moments in film. Its rich, resonant tones can add a sense of foreboding and tension to your scenes. Additionally, the tuba can also be used in a more lighthearted or comedic way, especially if played with a playful or mischievous flair. It can help create a darkly comedic atmosphere in the scenes where you want to add a touch of humor.
String Double Bass: The string double bass, when played with a bow, can produce a haunting, suspenseful sound that is well-suited for creating tension in your film. It has a darker, more subtle quality compared to the tuba, which can be effective for building suspenseful moments. However, it may not have the same comedic effect as the tuba, so if you want to use the bass instrument for both suspense and dark comedy, the tuba might be the more versatile choice.
Ultimately, the choice between the tuba and the string
double bass depends on the specific scenes and the overall tone you want to achieve in your film. If you prioritize consistency in the bass sound and want to use the same instrument for both suspense and dark comedy, the tuba might be the better option. However, if you're looking for a darker, more subtle sound for suspenseful moments and are willing to use a different instrument for dark comedy scenes, the string double bass could be a great choice.