Voxengo Overtone GEQ User Guide
Version 1.13
https://www.voxengo.com/product/overtonegeq/
Voxengo Overtone GEQ User Guide
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Contents
Introduction 3
Features 3
Compatibility 3
User Interface Elements 4
Graphic EQ View 4
Group Selection 4
Additional Information 5
Credits 6
Questions and Answers 7
Copyright © 2007-2019 Aleksey Vaneev
Voxengo Overtone GEQ User Guide
3
Introduction
Overtone GEQ is 7-band harmonic (overtone) graphic equalizer with multi-channel
operation support (supporting up to 8 input/output channels, audio host applicationdependent). Overtone GEQ offers extensive internal channel routing capabilities,
and supports mid/side channel processing.
Beside equalizing, Overtone GEQ applies harmonic enhancement processing: it uses
7 harmonic enhancement modules, one for each EQ band. This generates a complex
harmonic coloration you will probably like a lot.
Overtone GEQ was designed to allow audio engineers to apply quick EQ shape
adjustments together with adding a bit of harmonic richness to the audio material
(mainly mixes and sub-mixes due to a comparably high processing load this EQ puts
on a CPU).
Features
7-band graphic equalizing
+/- 12 dB gain range per band
2 graphic equalizer views
Stereo and multi-channel processing
Internal channel routing
Channel grouping
Mid/side processing
Complex harmonic coloration
Up to 8x oversampling
64-bit floating point processing
Preset manager
Undo/redo history
A/B comparisons
Contextual hint messages
All sample rates support
Zero processing latency
Compatibility
This audio plug-in can be loaded into any audio host application that conforms to the
AAX, AudioUnit, VST or VST3 plug-in specification.
This plug-in is compatible with Windows (32- and 64-bit Windows XP, Vista, 7, 8, 10
and later versions) and macOS (10.7 and later versions, 64-bit Intel processor-based)
computers (2.5 GHz dual-core or faster processor with at least 4 GB of system RAM,
SSE4.2 instructions support required, e.g. any Intel Core i-, AMD Bulldozer- or Zenbased processor). A separate binary distribution file is available for each target
computer platform and audio plug-in specification.
Copyright © 2007-2019 Aleksey Vaneev
Voxengo Overtone GEQ User Guide
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User Interface Elements
Note: Most interface elements (buttons, labels) located on the top of the user
interface and on the bottom are standard among all Voxengo plug-ins and do not
require much learning effort. For an in-depth description of these and other
standard user interface elements and features please refer to the “Voxengo Primary
User Guide”. Learned once it will allow you to feel comfortable with all pro audio
plug-ins from Voxengo.
Graphic EQ View
Overtone GEQ features two graphic EQ Views, having seven +/- 12 dB equalizer
bands each. Graphic EQ View features the “Reset” button which allows you to reset
the contents of the View to the default settings. The “Inv” button inverts equalizer
curve, and the “Up-Down” button, when being dragged, allows you to scale the
equalizer curve in order to amplify or attenuate it. The “Edit group” selector selects
which channel group’s EQ shape should be edited in the View, the “Underlay”
selector selects which channel group’s EQ shape to display underlay.
Note that frequency and gain read-outs can be dragged for vertical linear adjustment,
or adjusted with the mouse wheel.
Group Selection
The “Edit group” is the channel group whose EQ shape you are now editing
(selectable in the EQ View 1 and EQ View 2 individually).
The “Underlay” selects which channel group’s EQ shape to display as underlay in the
EQ View. Underlay can be useful when manipulating two EQ shapes for two channel
groups simultaneously, to see how these shapes differ from each other. When
working with a single channel group, the underlay is usually unnecessary.
Individual audio channels can be attached to channel groups via the Channel Routing
window. For example, this allows you to have individual EQ settings for channel “A”
and for channel “B”, separately. To achieve this simply assign channel “A” to group
“1”, and channel “B” to group “2”.
In surround setup you may assign left, right and front channels to group “1”, rear
surround channels to group “2”, LFE channel to group “3”, and apply an EQ shape to
them independently from each other.
Each audio channel within plug-in can be assigned to a single channel group only.
EQ settings of one group can be copied to another group by using the “Copy to”
button.
Copyright © 2007-2019 Aleksey Vaneev
Voxengo Overtone GEQ User Guide
5
Additional Information
Since Overtone GEQ implements graphic equalizing by means of an array of bellshaped EQ bands, when you boost or cut adjacent bands the actual boost or cut may
go over the visual setting (i.e. when some EQ band slider indicates 9 dB, the actual
audible boost may be 10.5 dB, if the nearest band also stays at 9 dB).
Copyright © 2007-2019 Aleksey Vaneev
Voxengo Overtone GEQ User Guide
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Credits
DSP algorithms, internal signal routing code, user interface layout by Aleksey Vaneev.
Graphics user interface code by Vladimir Stolypko. Graphics elements by Vladimir
Stolypko and Scott Kane.
This plug-in is implemented in multi-platform C++ code form and uses “zlib”
compression library (written by Jean-loup Gailly and Mark Adler), LibLZF by Marc
Alexander Lehmann, filter design equations by Magnus Jonsson and Robert BristowJohnson, VST plug-in technology by Steinberg, AudioUnit plug-in SDK by Apple,
Inc., AAX plug-in SDK by Avid Technology, Inc., Intel IPP and run-time library by
Intel Corporation (used under the corresponding licenses granted by these parties).
Voxengo Overtone GEQ Copyright © 2007-2019 Aleksey Vaneev.
VST is a trademark and software of Steinberg Media Technologies GmbH.
Copyright © 2007-2019 Aleksey Vaneev
Voxengo Overtone GEQ User Guide
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Questions and Answers
Q. I'm having trouble figuring out what the blue (underlay group) faders
do. Also, why is there two EQ views? Left/right operation?
A. Blue faders are “underlay” only and they show how faders in another group look.
Two EQ views are there for convenience only – so that you do not have to switch from
one group to another (if it was a single EQ view only).
Q. What this “underlay group” feature is for?
A. Underlay is there to see how EQ setting of “Edit group” differs from any other
(underlay) group.
Happy Equalizing!
Copyright © 2007-2019 Aleksey Vaneev
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