class_docstr: Mel frequency scale.
class_docstr_tok: ["Mel","frequency","scale","."]
docstr: Convert Hz to mel.
docstr_tok: ["Convert","Hz","to","mel","."]
code: def convert(f):
      """Convert Hz to mel."""
      return 1125.0 * torch.log(torch.div(f, 700.0) + 1.0)
  
imports: import math
  from typing import Union
  import torch
  from typeguard import check_argument_types
label_desc: Use image node_id 1 for calling the MelScale obj's underlying member method code with example usage: obj.convert(f) and returns: unknown