Dynamic EQ - Ozone 9 Help
Publish date: 2024-05-31
Table of Contents
Overview
The Dynamic EQ can be very useful in controlling specific frequencies in your mix that are too loud, with a degree of precision not possible with a static EQ.
There are three main areas of the Dynamic EQ module interface:
The module header includes the following controls:
- Analog: Selects minimum-phase IIR (infinite impulse response) filters.
- Digital: Selects linear-phase FIR filter types for processing in the Dynamic EQ module. FIR filters retain the phase of the original signal, but are more expensive in regard to CPU usage.
- The Dynamic EQ supports Stereo, Mid/Side, and Left/Right mode.
- See the General Controls chapter for more information.
Spectrum View
The Dynamic EQ module includes a spectrum analyzer with the following features:
- Dynamic EQ Gain Scale: (dB) The filter gain scale is located on the right side of the spectrum view. Range: +15 dB to -30 dB.
- Spectrum Magnitude Scale: (dB) Vertical scale displayed on the left side of the spectrum view.
- Spectrum Frequency Scale: (Hz) Horizontal scale displayed along the bottom of the spectrum view.
Spectrum Scales
- The scales for the filter gain and the spectrum magnitude are different, by design. If they were made to match, you wouldn’t see enough of the spectrum for it to be useful.
- See the Options chapter for more information about spectrum scale options.
Alt-Solo
You can use the alt/option key when clicking on a node or anywhere in the spectrum to momentarily solo a specific frequency region. When you release the mouse click, alt-solo will be disabled.
- Band Solo: Hold the alt or option key and click on an EQ node. This is equivalent to pressing the Solo button in the HUD.
- Alt-Solo in Spectrum: Hold the alt or option key and click anywhere on the frequency spectrum to solo frequencies surrounding the location of the cursor. You can adjust the bandwidth of the alt-solo filter in the Options window.
Working with Dynamic EQ Nodes
The following sections describe how to add, adjust and remove Dynamic EQ nodes.
Add Nodes
Default Filter Shape Assignment Based on Frequency
Default filter shapes are assigned to nodes depending on their initial frequency value.
- From 20 Hz to 100 Hz: Baxandall Bass. If a Baxandall Bass filter already exists in the curve, the default filter shape will be Proportional Q.
- From 100 Hz to 8 kHz: Proportional Q.
- From 8 kHz to 20 kHz: Baxandall Treble. If a Baxandall Treble filter already exists in the curve, the default filter shape will be Proportional Q.
Adjusting Nodes
The following methods can be used to move/adjust filter nodes:
- Click and drag a node up and down to adjust gain. Click and drag a node left and right to adjust frequency.
- Hold the shift key while clicking and dragging a node to lock the movement to the horizontal axis (for frequency) or vertical axis (for gain).
- Click and drag the handles that appear on the left/right side of a selected node to adjust the Q/Slope value.
- Press the up or down arrow keys to adjust the gain of a selected node. Press the left or right arrow keys to adjust the frequency of a selected node.
- Hold shift while using the arrow keys to make coarse value adjustments.
- Hold command (Mac) or ctrl (Windows) while using the arrow keys to make fine value adjustments.
- Double-click on a node to reset all band parameters to their default values.
Remove Nodes
The following methods can be used to remove filter nodes:
- Select a node and click the X button in the HUD to remove it.
- Click and drag to lasso select multiple nodes. Press delete or backspace key to remove all selected nodes.
- Hold Shift and click on individual nodes to select multiple nodes. Use the delete or backspace key to remove all selected nodes.
Set Dynamic Mode Direction
The arrow buttons directly above and below a node indicate the direction the filter will move when triggered. The filled arrow button indicates the currently selected direction.
Dynamic Mode Direction
Filters will behave as follows in the different modes:
- UP: When a signal exceeds the threshold, the filter will move upwards.
- Positive Gain: Using the Up trigger mode will move the filter from the center line toward the static node (boost when triggered).
- Negative Gain: Using the Up trigger mode will apply the full negative gain until it is triggered-when triggered it will move toward the center line.
- DOWN: When the signal exceeds the threshold, the filter will move downwards.
- Positive Gain: Using the Down trigger mode will move the filter from the static boost value toward the center line (cut when triggered).
- Negative Gain: Using the Down trigger mode will move the filter from the center line toward the static negative gain value.
Dynamic EQ HUD Controls
Click on a node to view the HUD panel for a given band.
The HUD panel includes the following sections:
- General Controls: Enable/disable, Solo, and Remove.
- Filter Controls: Filter Shape, Frequency, Gain, and Q.
- Threshold Controls: Threshold, Threshold Input meter, and gain change readout.
- Advanced Panel: Auto Scale, Attack, Release, and Static Offset Gain.
General Controls
You can enable/disable, solo, or remove a band with the buttons along the left edge of the HUD.
- POWER: Click the power button to enable or disable processing for the selected band.
- SOLO: Click the S button to isolate playback of the selected band.
- REMOVE: Click the X button to remove the associated band.
Filter Controls
You can adjust filter shape, frequency, gain, and Q/bandwidth in this section of the HUD.
- Filter Shape Selects the filter shape for the associated band. Filter shape types include:
- Baxandall: Inspired by the Baxandall EQ, with the addition of freely adjustable frequency. Choose between Bass for a gentle low shelf filter or Treble for a gentle high shelf filter. When to use: Transparent way of addressing extreme lows and extreme highs for a more natural, gentle sounding effect.
- Band Shelf: Bell filter with wide, flat top. When to use: To change the relation between the harmonics in your audio. Useful for boosting or attenuating a block of frequencies.
- Peak Bell: Smoothly boosts or cuts an adjustable region around a specific frequency. Looks like a bell, come on what do you want from me. When to use: Changes the overall color or texture of the sound with larger gain adjustments (boost or cut). This will be a more noticeable change than Proportional Q.
- Proportional Q: Unique filter that varies shape in proportion to the amount of boost or cut applied. As you increase or decrease the gain, the change is proportional to bandwidth. When to use: Tight, precise corrective cuts-the bigger gain adjustment, the tighter the cut will become.
- Freq: Determines the center or cutoff frequency of the selected band. Units: Hz (Hertz); Range: 20 Hz to 20 kHz.
- Gain: Determines the amount of gain applied to the selected filter. Units: dB (decibels); Range: -30 dB to +15 dB.
- Q: Determines the width or slope of parameteric/bell filters. Units: cF/Bandwidth.
Tip: HUD value adjustments
- Click and drag on a HUD text readout to scrub the value.
- Double-click on a text readout in the HUD, type a value in the inline edit field, press enter or click outside of the field to change the value.
Threshold Controls
You can adjust the Threshold and view related meters in this section of the HUD.
- Threshold Input meter: Vertical meter bars displayed behind the Threshold slider.
- Input Level Meter: Displays the input signal of the selected filter in the outer vertical meter bars.
- Gain Reduction/Addition: Displays the amount of level adjustment applied to the selected filter in the inner vertical meter bars.
- Threshold (dB): Determines the signal level at which dynamic gain adjustments will be triggered for the selected filter. Adjustment methods:
- Click and drag the slider up and down.
- Click on the slider handle then use the Up or Down arrow keys.
- Double-click on the value readout, type the value into the inline edit field, and press enter to save it.
- +/-: Displays the gain reduction/addition applied to the filter as a text based readout.
Advanced HUD Controls
Click the arrow on the right side of the HUD to expand the Advanced panel.
The Advanced Panel includes the following controls:
- Auto Scale: When enabled, the attack and release values will be scaled automatically depending on the frequency of the associated band.
- Attack: Adjusts how long it takes the dynamic trigger to react to a signal crosses the Threshold value. You can adjust the Attack value by clicking and dragging on the value readout or by double-clicking on the value readout and typing a value into the inline edit field.
- Release: Adjusts how long it takes for the dynamic trigger to return the filter to its static settings when the input signal falls below the Threshold value. You can adjust Release by clicking and dragging on the value readout or by double-clicking on the value readout and typing a value into the inline edit field.
- Offset: Sets a static gain offset for the associated band.
Ozone 9.12.1
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