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Forums     Discussions     Announces, Releases and Discussions Voxengo SPAN Plus 1.1 spectrum analyzer plugin released


Voxengo is pleased to announce the release of SPAN Plus version 1.1 - an extended real-time “fast Fourier transform” audio spectrum analyzer plug-in for professional music and audio production applications.  SPAN Plus is available in AudioUnit, VST and VST3 plug-in formats (including native 64-bit support), for Mac OS X (v10.5 and later), and Windows computers.

SPAN Plus is an extended version of the freeware SPAN plug-in: SPAN Plus provides several additional features such as PNG file export, real-time spectrum import/export and static spectrums display.

Version 1.1 includes the following changes:

  • The number of "Import From" slots increased to 5.
  • "dBFS.30" and "dBFS.15" metering options added.
  • 1/9 and 1/12 octave smoothing options added.
  • 65536 block size option added.
  • Increased "smoothed" graph drawing precision.
  • Increased overall spectrum drawing precision.

Voxengo SPAN Plus 1.1 Screenshot

SPAN Plus 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.

SPAN Plus supports multi-channel analysis and can be set to display spectrums from two different channels or channel groups at the same time.  Spectrum's color can be chosen to taste.

SPAN Plus also features output level metering with adjustable ballistics and integration time, K-metering (including calibration K-metering).  SPAN Plus displays level metering statistics, headroom estimation and clipping detection.  Correlation metering is available as well.

SPAN Plus features:

  • Real-time spectrum import/export
  • PNG file export
  • Static spectrums display
  • Output signal power statistics
  • Spectrum smoothing
  • User interface window resizing
  • Clipping statistics
  • Correlation meter
  • K-metering
  • Stereo and multi-channel analysis
  • Mid/side analysis
  • Internal channel routing
  • Channel grouping
  • Preset manager
  • Undo/redo history
  • A/B comparisons
  • Contextual hint messages
  • All sample rates support

Demo version of SPAN Plus can be downloaded freely at the Voxengo web site: http://www.voxengo.com/product/spanplus/


It appears that latest SPAN Plus is drawing a drastically different curve.  Is there any way to email you a .png file?  I have a curve of a kick drum that I have looped on a 1/4 note resolution, and the curve between versions 1.1 and 1.0 is drastically different.  I basically have to lower the loaded curve from version 1.0 by 8.5 dB just to line it up with the bass peak, and even then, the rest of the curve is considerably off.  Any ideas?

This is possible, previous versions could have huge overshoots on simple sinusoidal sounds, due to visual interpolation.  Now the overshoots are minimal, hence the displayed level may be lower.
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