code: def mel_to_spec(
      *, mel: np.ndarray = None, mel_basis: np.ndarray = None, **kwargs
  ) -> np.ndarray:
      """Convert a melspectrogram to full scale spectrogram."""
      assert (
          mel < 0
      ).sum() == 0, " [!] Input values must be non-negative."
      inv_mel_basis = np.linalg.pinv(mel_basis)
      return np.maximum(1e-10, np.dot(inv_mel_basis, mel))
  
imports: from io import BytesIO
  from typing import Tuple
  import librosa
  import numpy
  import scipy
  import soundfile
  from librosa import magphase, pyin
label_desc: Use image node_id 10 for calling a global function with example usage: mel_to_spec() and returns: np