Voxengo SPAN VST
Copyright (c) 2004-2005 Aleksey Vaneev
http://www.voxengo.com/freevst/
e-mail: support@voxengo.com

VST PlugIn Technology by Steinberg

README

SPAN is a real-time FFT spectrum analyzer PC VST plug-in. For the most part it
was derived from GlissEQ and CurveEQ professional equalizers and it reproduces
their spectrum analysis functionality.

Parameters:

    Block - specifies the block size of the FFT (Fast Fourier Transform)
            spectrum analyzer. The more the block size the more the resolution
            in the lower frequency range, but less time coherence in the
            higher frequency end.

    Speed - specifies the speed (averaging coefficient) of the spectrum
            analyzer. The less the speed the more latent spectrum analyzer is.
            This setting is effective only if the "RealT" monitoring mode is
            used.

    Slope - allows you to adjust the spectrum analyzer display slope towards
            higher frequencies. This can be useful because higher frequencies
            are usually weaker than lower frequencies, and thus tuning them
            can be a difficult task. By choosing an appropriate slope setting,
            you can compensate for this behavior and make the spectrum plot
            more convenient and meaningful.

    Channel - specifies which audio channel gets analyzed. "Avg" means the
              average of the L and R channels will be analyzed. "Max" means
              the maximum of the L and R channels will be analyzed.

    Monitor - specifies the monitoring mode. "RealT" means real-time
              spectrum is displayed. "Avg" means "average of all time" is
              displayed. "Max" means "maximum of all time" is displayed.

              In the "Inertia" mode the previously displayed spectrum will
              be displayed again in a darker color.

              In the "Full" display mode the whole spectrum resolution is
              used. Other options offer graph displays of varying resolution.

    Meter Mode - selects metering mode (the way RMS values represented).
                 Pure - standard RMS/PeakRMS value
                 Pure3 - standard RMS/PeakRMS value + 3 dB
                 K-20/K-14/K-12 - Katz metering system RMS/PeakRMS value

    Low Freq/High Freq - frequency range to display.

    dB Scale - specifies dB range to display. First value is dB shift and
               the second value is dB range.

    Peak Hold - amount of seconds to keep peaks displayed.

    You can click the analyzer surface with the left mouse button to reset
    the analyzer.

    By holding the CTRL key and dragging the control surface with the left
    mouse button you can enable the bandpass sweeping mode.

    Click any of the statistics counters to reset all counters. Please note
    that RMS counters show dB values: A/B, where B = A + 3 dB. PRMS (peak RMS)
    counter has 50 ms averaging time.


What's New:

    Version 1.7, 06-sep-2005
    ------------------------
    Occasional crash problem fixed.

    Version 1.6, 08-jul-2005
    ------------------------
    Metering mode switch implemented.

    Version 1.5, 01-jul-2005
    ------------------------
    Bandpass sweeping implemented.

    Version 1.4, 16-jun-2005
    ------------------------
    Peak hold hang-up issue fixed.

    Version 1.3, 12-feb-2005
    ------------------------
    1. Frequency range selection implemented.
    2. dB range selection implemented.
    3. Peak hold implemented.

    Version 1.2, 11-aug-2004
    ------------------------
    1. Channel statistics (RMS, Peak RMS and Clip counter) implemented.
    2. L+R channel display mode implemented. The right channel's spectrum is
       displayed in red color.
    3. Bar graph display modes implemented.

    Version 1.1, 24-may-2004
    ------------------------
    "Inertia" visual mode added.

    Version 1.0, 23-may-2004
    ------------------------
    Initial release.

VST is a trademark of Steinberg Media Technologies GmbH.

06-sep-2005
