code: def inv_scale_db(db_scaled):
      """Scales [0, 1] to [-DB_RANGE, 0]."""
      return (db_scaled - 1.0) * DB_RANGE
  
imports: import ddsp
  from ddsp.training import nn
  import gin
  import tensorflow
label_desc: Use image node_id 3 for calling a global function with example usage: inv_scale_db(db_scaled) and returns: unknown