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Match EQ parameters in Logic Pro for Mac

Match EQ offers the parameters described in this section.

Display and view parameters

Figure. Match EQ window showing the Current frequency spectrum, EQ curve, and the spectrum analyzer.

  • Main display: Shows four different frequency response curves depending on which buttons are activated. Choices are:

    • Current button: Select to show the loaded frequency spectrum (green) for the Current signal.

    • Reference button: Select to show the loaded frequency spectrum (purple) for the Reference signal.

    • EQ Curve button: Select to show the frequency response curve applied to the signal on this channel strip (the Match button has to be active). If you select the Current of Reference button, the curve appears in a yellow or dimmed yellow color.

    • Analyzer button: Select to show the real-time frequency spectrum of the audio signal on the channel strip during playback. It is displayed in addition to the Current, Reference, or EQ Curve. The curve remains visible when pausing playback.

  • Analyzer Pre/Post button: Choose whether the Analyzer displays the signal on the channel strip before (Pre) or after (Post) it passes through the EQ curve.

  • Smoothing slider and field: Set the amount of smoothing for the EQ curve. Increase the value to even out sudden value changes.

    Note: Smoothing has no effect on any manual changes you make to the EQ curve.

  • Channel pop-up menu: Click to choose which channels are displayed by the Analyzer, Current, and Reference spectrum. Choose L&R for stereo, or an individual L or R channel. In surround instances, choose “All channels” or an individual channel. Changes to the EQ curve affect the chosen channel if a single channel is selected.

    Note: The Channel pop-up menu isn't available when you use the effect on a mono channel strip.

  • Hide Others checkbox: Hide or show other channels in the display when an individual channel is chosen in the Channel pop-up menu. The visible impact of this parameter is directly tied to the Channel Link slider value.

    Note: The Hide Others checkbox isn't available when you use the effect on a mono channel strip.

  • Channel Link slider and field: Refine settings made with the Channel pop-up menu.

    • When set to 100%, all channels are represented by a common EQ curve.

    • When set to 0%, a separate EQ curve is displayed for each channel (chosen with the Channel pop-up menu).

    • Settings between 0 and 100% blend these values with your EQ curve changes for each channel. This results in a hybrid curve.

    Note: The Channel Link slider and field isn't available when you use the effect on a mono channel strip.

  • LFE Handling buttons: In surround instances, click to process or bypass the LFE channel. Click the disclosure triangle in the lower-left corner to show the Extended Parameters area.

  • Scale display: Drag the scale on the left of the display vertically to move the 0 dB reference line up or down to adjust the visible dB range of the display. This functionality is only available if you have the Analyzer button selected.

Learn and match frequency spectrum parameters

Figure. Match EQ window showing the Reference frequency spectrum and the spectrum analyzer.

The following buttons and menu commands let you create the source material (for example, the frequency spectrum of your song) and the reference material (for example, the frequency spectrum of your reference song) to have the plug-in create a matching frequency response curve. This represents how your song needs to be equalized to sound similar to the sonic quality of your reference song.

  • Current Learn button: Start and stop the process of learning the frequency spectrum of the audio signal you play back on the channel strip. It represents the source material that you match against the reference material. The learned frequency spectrum is shown in the main display when the Current button is selected.

  • Reference Learn button: Start and stop the process of learning the frequency spectrum of the audio signal you receive on the side chain input of the Match EQ plug-in during playback. It represents the reference material the source material is matched against. The learned frequency spectrum is shown in the main display when the Reference button is selected.

  • EQ Curve Match button: Click to turn the EQ curve on or off. This is the frequency response curve that, during playback, is applied to the audio signal on the channel strip (your song) to match the frequency spectrum of the reference material (your reference song).

  • Action menus: Choose and execute commands from the Current or Reference Action menus.

    • Clear Current/Reference Material Spectrum: Clears the Current/Reference frequency spectrum.

    • Copy Current/Reference Spectrum: Copies the Current/Reference frequency spectrum to the Clipboard.

    • Paste Current/Reference Spectrum: Pastes the Current/Reference frequency spectrum from the Clipboard.

    • Load Current/Reference Material Spectrum from settings file: Opens a Finder window showing the Match EQ plug-in settings folder to load a previously saved Match EQ plug-in setting containing the Current/Reference frequency spectrum.

    • Generate Current/Reference Material Spectrum form audio file: Opens a Finder window to navigate to an audio file. Select the audio file to learn its frequency spectrum to be loaded as the Current/Reference frequency spectrum.

Edit EQ curve parameters

Figure. Match EQ window showing EQ Curve with boost and cut lines and handles.

The default EQ curve is calculated by matching the Current frequency response to the Reference frequency response loaded in the plug-in. You can use the following parameters to tweak that curve:

  • Gain offset: Drag the scale on the right up or down to apply a gain offset to the EQ curve.

    Note: You can also drag the left scale if the Analyzer button is deactivated.

  • Manual adjustments: When the EQ Curve button is selected, you can adjust the frequency response curve using the following gestures:

    • Drag vertically to adjust the level of that specific frequency.

    • Drag horizontally to adjust the affected frequency.

    • Hold the Shift key after starting to drag vertically to change the Q factor, the width of the affected area.

    • Option-click to reset all manual EQ curve changes.

    Note: A help tag appears while dragging, showing the frequency, gain, and Q of the applied changes.

  • Apply slider and field: Increase or decrease the impact of the EQ curve.

    • Values greater than 100% magnify the effect.

    • Values less than 100% reduce effect.

    • Negative values (−1% to −100%) invert the peaks and troughs in the filter curve.

      Note: Control-click the slider to set it to 100%, which represents the default curve without manual changes.

  • Ease-In/Ease-Out checkbox: Select to have the EQ curve adjusted according to the frequency level. Select Ease-In to adjust in the low frequency range, and Ease-Out to adjust in the high frequency range. When the EQ Curve button is selected, the following handles appear in the main display:

    • Ease-in low/high handles: Drag the left and right handles on the left to set a frequency band, representing the ease-in area. The EQ curve is adjusted so frequencies below its low frequency handle result in a flat 0 dB curve (no EQ effect), and frequencies above its high frequency handle are processed by the actual EQ curve. In the ease-in area, the EQ curve is gradually increasing from 0 dB to its actual values.

    • Ease-in area: Horizontally drag the area between the handles to move both the low and high handles simultaneously.

    • Ease-out low/high handles: Drag the left and right handles on the right to set a frequency band, representing the ease-out area. The EQ curve is adjusted so frequencies below its low frequency handle are processed by the actual EQ curve, and frequencies above its high frequency handle result in a flat 0 dB curve (no EQ effect). In the ease-out area, the EQ curve gradually decreases its actual values down to 0 dB.

    • Ease-out area: Horizontally drag the area between the handles to move both the low and high handles simultaneously.

  • Limit Boost checkbox: Select to set and adjust the EQ curve so it doesn’t exceed a specific positive dB value (boost). If selected, a horizontal line with a handle appears in the display on or above the 0 dB line (only visible when the EQ Curve button is selected).

    • Limit Boost Max line or handle: Drag the line or the handle vertically to set the maximum positive value (boost) the EQ curve can reach.

  • Limit Cut checkbox: Select to set and adjust the EQ curve so it doesn’t exceed a specific negative dB value (cut). If selected, a horizontal line with a handle appears in the display on or below the 0 dB line (only visible when the EQ Curve button is selected).

    • Limit Cut Max line or handle: Drag the line or the handle vertically to set the maximum negative value (cut) the EQ curve can reach.

    • Limit boost/cut max area: Vertically drag the area between the handles to move both the upper and lower limits simultaneously.

  • Phase pop-up menu: Choose the operational principle of the EQ curve, which is always a trade-off between phase shifts (inherent to equalizers), latency, and CPU load.

    • Linear: Processing doesn’t introduce any phase shifts, which results in higher latencies.

    • Minimal: Processing allows minimal phase shifts to reduce latency.

    • Minimal, Zero Latency: Processing allows minimal phase shifts, but achieves zero latency with a higher CPU overhead than the other options.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

Control Surfaces Support Guide: PDF

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