furnace/doc/8-advanced/spectrum.md
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2025-11-19 19:17:11 -05:00

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spectrum

the Spectrum window shows the frequency spectrum of the audio output.

spectrum window

the X axis (horizontal logarithmic scale) is frequency in Hz, and the Y axis (vertical linear scale) is amplitude in decibels.

clicking the three-line "hamburger" button in the top right corner opens a configuration dialog.

  • Mono: mix all output together to display a single line.
  • Bins: number of bins for the FFT calculation. higher numbers increase frequency resolution but decrease temporal resolution (slower response).
  • X Zoom: how much to zoom the X axis.
  • X Offset: how much to move the X axis horizontally.
  • Y Offset: how much to move the Y axis down.
  • Show X Grid: whether to show the X axis grid lines.
  • Show Y Grid: whether to show the Y axis grid lines.
  • Show X Scale: whether to show the X axis scale.
  • Show Y Scale: whether to show the Y axis scale.