Enhance audio

Final Cut Pro includes several powerful tools for both analyzing and enhancing the audio portion of clips, including:

  • Loudness: Improves the main audio signal and makes it more uniform.

  • Background Noise Removal: Reduces background noise.

  • Hum Removal: Reduces common electrical hum noise at either 50 or 60 Hz.

You can analyze audio and adjust loudness, background noise, and hum using the Audio Enhancements inspector. You can also analyze and fix audio problems when you import a clip.

The Audio Enhancements section of the Audio inspector also includes:

  • Equalization: Enhances the high-end (treble), midrange, or low-end (bass) frequencies.

All enhancements are designed to correct most common audio problems automatically or with minor adjustments.

Note: When you import a clip, the analyze and fix audio function only corrects severe audio problems. If the clip contains moderate problems, these appear in yellow next to Audio Analysis in the Audio Enhancements section of the Audio inspector after the clip is imported. To correct these, you need to automatically enhance audio in the Audio Enhancements inspector.

Analyze audio

  1. Select an audio clip or video clip with audio in the Timeline.

  2. To analyze the audio, do one of the following:

    • Choose Window > Go To > Audio Enhancements (or press Command-8).

    • Choose Show Audio Enhancements from the Enhancements pop-up menu in the toolbar.

      Enhancements pop-up menu in toolbar
    • In the Audio inspector, click the Audio Enhancements Inspector button next to Audio Analysis in the Audio Enhancements section. (The button changes color if any adjustments have been made.)

    The Audio Enhancements inspector appears. After analysis, indicators appear next to each enhancement to show results:

    • A red sign indicates severe problems.

    • A yellow warning triangle indicates potential problems.

    • A green checkmark indicates OK.

  3. To close the Audio Enhancements inspector, click the back button .

You can automatically or manually change enhancement settings to correct any problems.

Automatically enhance audio

You can automatically enhance audio to analyze for and correct loudness, background noise, and hum.

  1. Select an audio clip or video clip with audio in the Timeline.

  2. Do one of the following:

    • Choose Modify > Auto Enhance Audio.

    • Choose Auto Enhance Audio from the Enhancements pop-up menu in the toolbar.

      Enhancements pop-up menu in toolbar
    • Click the Auto Enhance button at the bottom of the Audio Enhancements inspector.

  3. To close the Audio Enhancements inspector, click the back button .

After analysis, a green checkmark next to an enhancement indicates that the clip was analyzed for that enhancement. Details appear if a correction was automatically applied.

A blue checkbox appears next to each enhancement that was turned on to apply a correction. Deselect the checkbox to turn off an enhancement.

Apply enhancements manually

After you analyze audio, you can adjust the enhancements manually.

  1. Select an audio clip or video clip with audio in the Timeline.

  2. To show the Audio Enhancements inspector, do one of the following:

    • Choose Window > Go To > Audio Enhancements (or press Command-8).

    • Choose Show Audio Enhancements from the Enhancements pop-up menu in the toolbar.

      Enhancements pop-up menu in toolbar
    • In the Audio inspector, click the Audio Enhancements Inspector button next to Audio Analysis in the Audio Enhancements section. (After you make any adjustments, the button changes color.)

  3. To turn on an enhancement, click its icon or select its checkbox (when the enhancement is turned on, its checkbox is blue).

    Audio Enhancements inspector showing checkbox for turning enhancement on or off
  4. If necessary, do any of the following:

    • To change Loudness settings: Drag the Amount and Uniformity percentage sliders. The Amount slider increases or decreases the overall loudness (compression) of the clip, while the Uniformity slider increases or decreases the dynamic range affected.

    • To change the percentage of Background Noise Removal: Drag the Amount slider.

    • To remove hum: Select either 50 Hz or 60 Hz for Hum Removal.

  5. To close the Audio Enhancements inspector, click the back button .

Adjust equalization

  1. Select the clip in the Timeline.

  2. In the Audio Enhancements section of the Audio inspector, choose an Equalization preset from the Equalization pop-up menu, or click the Controls button to make manual adjustments.

    Audio Enhancements section of Audio inspector showing Equalization pop-up menu and Controls button

If you want a clip to sound like another clip, you can match the audio.