Generating a Signal from a Spectrum

This procedure shows how to generate a signal from a spectrum.

To Generate a Signal from a Calculated Spectrum:

You need a spectral data file (*.xml, *.txt, *.csv or *.spectre) complying with the supported types. For more details about *.txt spectral data file, see Source Formats.

  1. Click File > Generate signal from spectrum... then select a spectrum file.

    The Signal generation from spectrum window is displayed.

  2. In the Signal generation from spectrum window, type a Duration in seconds.
    Note: The sound created from spectrum calculation is stationary whatever the duration.
  3. Set the Sampling Frequency in Hertz. Make sure that you set a sampling frequency value higher than twice the maximum frequency contained in the frequency axis of the spectrum.
  4. From Method, choose:

    • Inverse FFT to use a spectrum inversion or,

    • Harmonic Method to use a sinusoidal interpolation or,

    • Automatic to use an hybrid method that mixes Inverse FFT and Harmonic to improve the sound quality.

  5. Click Generate.
  6. Click Play $ to listen.
  7. Go to File > Save to create a WAV file.

The sound is created, and its waveform is displayed into a temporal window.

Tip: Next is right-clicking the waveform to calculate the spectrum.