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Spectral Expander

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HENDRIX-ZT2 edited this page Oct 28, 2019 · 2 revisions

This tool can be used to restore the original volume dynamics of a dynamically compressed audio file, provided the following conditions are met:

  • the compressor operated in a single band
  • the noise floor is affected by the compression
  • at least some band of the noise floor is relatively unobstructed by actual signal

Imgur

Imgur

How to use

  1. Open an audio file.
  2. Set frequency bounds of noise band to sample. The averaged volume for this band will be plotted for the selected channels.
  3. Set dB clipping values for the noise band. You can also right click inside the chart to place the boundary lines. Use the upper limit to clip intruding signal transients to prevent silencing them.
  4. Optionally adjust the smoothing value but the default seems to be work very well.
  5. Click Expand to write decompressed output file.
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