Plugin Alliance EQ825 Mastering Equalizer User Manual

EQ825 Mastering Equalizer

Specifications

  • Product Name: Lindell EQ825 Mastering Equalizer
  • Brand: Lindell Plugins

Product Usage Instructions

1. Toolbar Overview

The toolbar provides quick access to various settings:

  • A / B: Allows switching between two different
    settings for comparison.
  • Copy Button (>): Copies the current memory
    to the other memory.
  • Graph: Displays the EQ curve editor. Click L
    or R to select the channel for editing.

2. Menu Options

  • About: Shows plugin version and credits
    information.
  • Calibration: Choose the calibration level for
    mapping digital dBFS to virtual dBu.
  • Oversampling: Select oversampling mode to
    reduce aliasing.
  • UI Zoom: Adjust the UI size from 80% to
    150%.
  • Noise: Toggle plugin noise on/off.

3. EQ Band Controls

  • LOW (Yellow): Adjust low shelf frequency and
    gain.
  • LOW MID (Red): Control center frequency and
    gain for low-mid range.
  • MID (Orange): Tune center frequency and gain
    for mid-range.
  • HIGH MID (Green): Set high-mid frequency and
    adjust gain.
  • HIGH (Blue): Manage high shelf frequency and
    gain.

4. Gain Controls Behavior

The gain knobs’ behavior has been adjusted for intuitive
control. Gain in dB is directly proportional to knob rotation,
unlike the original hardware unit.

5. Global Controls

  • GAIN INPUT: Adjusts the input level entering
    the plugin.
  • OUTPUT: Controls the output level of the
    plugin.
  • THD: Regulate analog harmonic distortion
    level.

Frequently Asked Questions (FAQ)

Q: How can I link the Left and Right controls?

A: Use the ‘LINK’ option to link the Left (Mid) and Right (Side)
controls. Changes made to one channel will reflect on the
corresponding parameter of the other channel.

Q: What does M/S activation do?

A: Activating M/S switches to Mid/Side stereo processing mode
instead of Left/Right, providing a different stereo processing
approach.

Q: What is the purpose of proportional Q design?

A: The proportional-Q design narrows bandwidth as gain
increases, contributing to a musical yet precise character,
especially in mastering scenarios. This behavior is faithfully
replicated in the plugin for each band.

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Lindell Plugins
LINDELL EQ825
Mastering Equalizer

Lindell Plugins – Lindell EQ825

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Show curve editor

Toolbar

License bar

Lindell EQ825
Lindell Plugins – Lindell EQ825

Menu Curve editor Analyzer
Left (Mid) Right (Side)
2

Lindell EQ825 Toolbar.

Toolbar
A / B Gives access to two different settings, for quick comparison. The selected memory appears in blue. All the parameter changes or preset loads affect only the selected memory.
Copy Button (>) When clicked, the current memory is copied to the other memory.
Graph Shows the EQ curve editor. When link is disabled, click L or R to select which channel is edited.
Menu
Common commands « Set in all instances » copies the parameter value to all the instances of the plugin in the session. This can also be achieved by [shift] + clicking on a menu option. « Save as default » sets the current parameter value as the default one when the plugin opens. This can also be achieved by [alt] + clicking a menu option.

About Shows the plugin version and credits information.
Calibration You can chose the calibration level here (the mapping between the real digital dBFS level and the virtual dBu level in the simulated circuits). The calibration level is often expressed as XX dBFS = 0 VU (or +4 dBu).
Oversampling You can select the oversampling mode here. Higher oversampling reduces aliasing problem but makes the processing n-times more CPU intensive.
UI Zoom The Lindell EQ825 UI size can be reduced using this menu options from 80% to 150% of its normal size. Note that the plugins size will never get larger than 80% of the screen width/height, regardless of the UI Zoom setting.
Noise The plugin adds a very low amount of noise that is usually inaudible (the noise floor). It can be turned off here.

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EQ BAND
LOW (Yellow) FREQ: Selects the corner frequency for the low shelf (20Hz, 30Hz, 60Hz, 100Hz). GAIN: Boosts or cuts the low-frequency range (+-12dB).
LOW MID (Red) FREQ: Selects center frequency (60Hz to 1kHz). GAIN: Boosts or cuts the selected frequency (+-12dB).
MID (Orange) FREQ: Center frequency from 1.5kHz to 5kHz. GAIN: Boost/cut control (+-12dB).
HIGH MID (Green) FREQ: Selects from 6kHz to 16kHz. GAIN: Boosts or cuts the selected high-mid frequency (+-12dB).

Lindell Plugins – Lindell EQ825

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HIGH (Blue) FREQ: Selects the corner frequency of the high shelf (3kHz, 5KHz, 10kHz, 20kHz) GAIN: Boosts or cuts the low-frequency range (+-12dB).
Note on the Gain Controls Behavior The gain knobs response has been intentionally adjusted compared to the original hardware to improve usability. In this plugin, gain in dB is directly proportional to knob rotation, allowing for more intuitive control. So when comparing with the hardware unit, do not rely solely on matching knob positions.
Proportional Q The original hardware employs a proportional-Q design, where the bandwidth narrows as the gain increases. This behavior contributes to its musical yet precise character, particularly in mastering contexts. The plugin faithfully replicates this behavior for each band.
LINK Links the Left (Mid) and Right (Side) controls. When a parameter is changed on on channel, the corresponding parameter on the other channel is also modified.
M/S Activates Mid/Side stereo processing instead of Left/Right.

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GLOBAL CONTROLS
GAIN INPUT: controls the level entering the plugin. OUTPUT: controls the level at the plugin output.
THD Total harmonic distortion. Use it to adjust the amount of analog harmonic distortion, with 0dB being the normal emulated hardware distortion level.
HIGH PASS Adds a high pass filter after the main EQ filters. Frequency: 15Hz to 300Hz, Slope: 6dB/oct. to 36dB/oct. .
LOW PASS Adds a lowpass filter after the main EQ filters. Frequency: 3kHz to 40kHz, Slope: 6dB/oct. to 36dB/oct. .

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Special Processing
MONO 200Hz Collapses all content below 200Hz to mono.
OCTAVE FILLER Enhances the perceived weight and fullness of the low end using psychoacoustic principles. The trim can be used to select the center frequency of the effect. INTENSITY: controls how much the bass content is pushed.

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Credits
Emmanuel Dubecq – LSR audio Design Programming Graphics Circuit modeling
Tobias Lindell – Lindell Audio Design Tests and tuning Presets

Lindell Plugins – Lindell EQ825

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Documents / Resources

Plugin Alliance EQ825 Mastering Equalizer [pdf] User Manual
EQ825 Mastering Equalizer, EQ825, Mastering Equalizer, Equalizer

References

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