Voxengo has released version 2.5 of SPAN, a free real-time “fast Fourier transform” audio spectrum analyzer plugin for professional music and audio production applications.

Voxengo SPAN

For the most part it was derived from Voxengo GlissEQ dynamic parametric equalizer and reproduces its spectrum analysis functionality.

SPAN provides you with a very flexible “mode” system which you can use to setup your spectrum analyzer preferences. You may specify Fourier block size in samples, FFT window overlap percentage, spectrum’s visual slope. Beside that you can choose to display secondary spectrum of a desired type (e.g. real-time maximum, all-time maximum). Spectrum can be smoothed out visually for an easier examination.

Changes in SPAN v2.5

  • Crash issue reported in Apple Logic Pro fixed.
  • If secondary spectrum is active, the delta between primary and secondary spectrums at cursor position is now displayed.
  • A crash related to UI resizing function fixed.

SPAN for Windows and Mac (VST/AU) is available to download as freeware.

More information: Voxengo / SPAN