Logic Pro Linear Phase EQ parameters

The central area of the Linear Phase EQ window includes the graphic display and parameters for shaping each EQ band. The master Gain slider is shown at the right. The Analyzer and Q Couple controls are shown at the lower left.

Figure. Linear Phase EQ window.

Linear Phase EQ parameters

  • Band 1 On/Off button: Switch on a low cut filter that allows high frequencies to pass and reduces the level of low frequencies near the cutoff (set) frequency.

    • Band 1 background or control point: Drag the red control point to change the frequency and Q values. Drag the red shaded area horizontally to change the frequency value.

    • Band 1 vertical/horizontal line: Drag vertically to change the slope.

      Note: The Q parameter of band 1 and band 8 has no effect when the slope is set to 6 decibels per octave. When the Q parameter is set to an extremely high value, such as 100, these filters affect only a very narrow frequency band and can be used as notch filters.

  • Band 2 On/Off button: Switch on a low shelving filter that adjusts the level of low frequencies and has a minimal impact on frequencies above the cutoff (set) frequency.

    • Band 2 background or control point: Drag the orange shaded area, curve, or control point to change the frequency and gain values. Click the control point to select the band.

    • Band 2 horizontal line: Drag vertically to change the gain value.

    • Band 2 vertical line: Drag horizontally to change the Q value.

    • Band 2 vertical/horizontal lines: Drag to change the gain and Q values.

  • Band 3 On/Off button: Switch on a parametric filter with three controls. Frequency sets a center frequency. Q sets the width of the frequency band around the center frequency. Gain sets the level of the band.

    • Band 3 background or control point: Drag the yellow shaded area, curve, or control point to change the frequency and gain values. Click the control point to select the band.

    • Band 3 horizontal line: Drag vertically to change the gain value.

    • Band 3 vertical line: Drag horizontally to change the Q value.

    • Band 3 vertical/horizontal lines: Drag to change the gain and Q values.

  • Band 4 On/Off button: Switch on a parametric filter with three controls. Frequency sets a center frequency. Q sets the width of the frequency band around the center frequency. Gain sets the level of the band.

    • Band 4 background or control point: Drag the green shaded area, curve, or control point to change the frequency and gain values. Click the control point to select the band.

    • Band 4 horizontal line: Drag vertically to change the gain value.

    • Band 4 vertical line: Drag horizontally to change the Q value.

    • Band 4 vertical/horizontal lines: Drag to change the gain and Q values.

  • Band 5 On/Off button: Switch on a parametric filter with three controls. Frequency sets a center frequency. Q sets the width of the frequency band around the center frequency. Gain sets the level of the band.

    • Band 5 background or control point: Drag the aqua shaded area, curve, or control point to change the frequency and gain values. Click the control point to select the band.

    • Band 5 horizontal line: Drag vertically to change the gain value.

    • Band 5 vertical line: Drag horizontally to change the Q value.

    • Band 5 vertical/horizontal lines: Drag to change the gain and Q values.

  • Band 6 On/Off button: Switch on a parametric filter with three controls. Frequency sets a center frequency. Q sets the width of the frequency band around the center frequency. Gain sets the level of the band.

    • Band 6 background or control point: Drag the blue shaded area, curve, or control point to change the frequency and gain values. Click the control point to select the band.

    • Band 6 horizontal line: Drag vertically to change the gain value.

    • Band 6 vertical line: Drag horizontally to change the Q value.

    • Band 6 vertical/horizontal lines: Drag to change the gain and Q values.

  • Band 7 On/Off button: Switch on a high shelving filter that adjusts the level of high frequencies and has a minimal impact on frequencies below the cutoff (set) frequency.

    • Band 7 background or control point: Drag the purple shaded area, curve, or control point to change the frequency and gain values. Click the control point to select the band.

    • Band 7 horizontal line: Drag vertically to change the gain value.

    • Band 7 vertical line: Drag horizontally to change the Q value.

    • Band 7 vertical/horizontal lines: Drag to change the gain and Q values.

  • Band 8 On/Off button: Switch on a high cut filter that allows low frequencies to pass and reduces the level of high frequencies near the cutoff (set) frequency.

    • Band 8 background or control point: Drag the pink control point to change the frequency and Q value. Drag the pink shaded area horizontally to change the frequency value.

    • Band 8 vertical/horizontal lines: Drag vertically to change the slope.

  • Frequency control: Drag to set the frequency of the selected band.

  • Gain/Slope control: Drag to set the amount of gain for the selected band. For bands 1 and 8, this changes the slope of the filter.

  • Q control: Drag to set the Q factor or resonance of the effected range around the center frequency in the selected band.

    Note: The Q parameter of band 1 and band 8 has no effect when the slope is set to 6 decibels per octave. When the Q parameter is set to an extremely high value, such as 100, these filters affect only a very narrow frequency band and can be used as notch filters.

  • Analyzer Range display: Drag vertically to adjust the scaling of the Analyzer range. Control-click to open a shortcut menu where you can set the Analyzer Range value.

  • Scale display: Drag vertically to adjust the scaling of the overall EQ curve. Control-click to open a shortcut menu where you can set the EQ dB Scale Mode.

  • Master Gain slider and field: Set the overall output level of the signal. Use it after boosting or cutting individual frequency bands.

  • Analyzer button: Turn the Analyzer on or off. Play the audio signal and watch the graphic display to identify peaks and troughs in the frequency spectrum. Control-click to open a shortcut menu where you can set Analyzer Mode and Analyzer Resolution. See Linear Phase EQ shortcut menus, Logic Pro Linear Phase EQ Analyzer, and Logic Pro Linear Phase EQ extended parameters.

  • Analyzer (Pre/Post) button: Set to display the frequency curve before or after EQ is applied, when Analyzer mode is active.

  • Q-Couple button: Turn on Gain-Q coupling, which automatically adjusts the Q when you raise or lower the gain on any EQ band. This preserves the perceived bandwidth of the bell curve. Control-click to open a shortcut menu to set the Gain-Q Couple Strength value. See Linear Phase EQ shortcut menus.

  • Processing pop-up menu: Choose to process both sides of a stereo signal, or the Left Only, Right Only, Mid Only, or Side Only signal. See Logic Pro Linear Phase EQ use tips for information about using Linear Phase EQ with Mid-Side recordings.

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