 not to return a AudioPipelineOutput, ImagePipelineOutput or a plain tuple.   Returns 
List[PIL Image]
  
A list of Mel spectrograms (float, List[np.ndarray]) with the sample rate and raw audio.
  The call function to the pipeline for generation. Examples:  For audio diffusion:   Copied import torch
from IPython.display import Audio
from diffusers import DiffusionPipeline

device = "cuda" if torch.cuda.is_available() else "cpu"
pipe = Diffusion