code: def inv_scale_f0_hz(f0_scaled):
      """Scales [0, 1.0] MIDI-scaled to [0, Nyquist] Hz."""
      return ddsp.core.midi_to_hz(f0_scaled * F0_RANGE)
  
imports: import ddsp
  from ddsp.training import nn
  import gin
  import tensorflow
label_desc: Use image node_id 5 for calling a global function with example usage: inv_scale_f0_hz(f0_scaled) and returns: ddsp