Visualizing waveforms: plotwav

### 15.1.9 Visualizing waveforms: plotwav

The plotwav command displays the waveform of an audio clip.

- plotwav takes one mandatory argument and one optional argument:
  - A, an audio clip.
  - Optionally, range; one of:
    - range=[m,n] for integers m and n (representing sample units).
    - range=a..b for floating point numbers a and b (representing seconds).
- plotwav(A ⟨range⟩) displays the waveform A, in its entirety or over the optional specified range.

Examples.
Assuming that the directory sounds contains two wav files, example1.wav (a man speaking, stereo) and example2.wav (guitar playing, mono):

- Input:

  clip1:=readwav("/path/to/sounds/example1.wav"):;
  plotwav(clip1)

  Output:
- Input:

  clip2:=readwav("/path/to/sounds/example2.wav"):;
  plotwav(clip2)

  Output:
- Input:
  plotwav(clip2,range=0.5..0.52)
  Output: