An array of betas to pass directly to the constructor without using `beta_start` and `beta_end`.
variance_type (`str`, defaults to `"fixed_small"`):
Clip the variance when adding noise to the denoised sample. Choose from `fixed_small`, `fixed_small_log`,
`fixed_large`, `fixed_large_log`, `learned` or `learned_range`.
clip_sample (`bool`, defaults to `True`):
Clip the predicted sample for numerical stability.
clip_sample_range (`float`, defaults to 1.0):