Making Real-Time Audio Filter Adjustments

You may find it easier to make adjustments to an audio filter while the clip it’s applied to plays. This way, you can hear how the adjustment sounds as you modify the filter’s parameter.

To make real-time changes to an audio filter parameter
  1. In the Timeline, double-click the sequence clip with the audio filter you want to modify.

    The sequence clip opens in the Viewer.

  2. In the Viewer, click the Filters tab to see the clip’s audio filter parameters.

  3. Move the playhead to the position in your clip where you want to make a filter parameter change.

  4. Play the sequence.

  5. Adjust the controls for the audio filter parameter you want to change.

    You hear your changes immediately.

  6. When you’ve finished making changes, stop playback.

    When you release the mouse button, your change is applied to the filter parameter.

Looping Playback While Making Real-Time Filter Adjustments

Ordinarily, playing back your sequence clip in the Viewer plays back your entire clip, from the starting position of the playhead forward. If you instead want to loop a limited section of your clip as you adjust a filter’s parameters, you can turn on Looped Playback, set In and Out points to determine how much of your clip plays back, and use the Play In to Out command to loop playback.

To loop a section of a clip while making real-time filter adjustments
  1. With your clip opened in the Viewer, set In and Out points in the keyframe graph area of the Filters tab.

    Figure. Filters tab showing In and Out points in the keyframe graph area.
  2. In the keyframe graph ruler, move the playhead to the In point.

  3. Choose View > Loop Playback to turn on looped playback.

  4. To loop playback, choose Mark > Play > In to Out, or press Shift-Backslash (\).

    Playback loops repeatedly between the In and Out points, and you can make real-time changes to any audio filter parameters.

    To stop playback, press the Space bar or the J key, or click the Stop button in the Canvas.

Recording Audio Filter Automation

As long as the Record Audio Keyframes button at the top of the Audio Mixer is selected, keyframes are recorded whenever an audio filter is adjusted during playback. Automation recording begins when you position the pointer on an audio filter control and hold down the mouse button, and recording continues until you release the mouse button. The number of recorded keyframes depends on which option you choose from the Record Audio Keyframes pop-up menu in the Editing tab of the User Preferences window.

To record audio filter automation
  1. Choose Tools > Audio Mixer (or press Option-6).

  2. Click the Record Audio Keyframes button at the top of the Audio Mixer to turn on keyframe recording.

    Tip: You can click the Record Audio Keyframes button to turn keyframe recording on or off during playback, if necessary.

  3. With your clip opened in the Viewer, move the playhead to the place in the keyframe graph area in the Filters tab where you want to record audio filter automation.

    It’s a good idea to start a few seconds before the section you’ll be mixing, to give yourself time to get ready.

  4. Begin playback.

  5. Position the pointer over the audio filter control you want to adjust, then hold down the mouse button to begin keyframe recording.

  6. Hold down the mouse button to continue recording keyframes, and move the control you’ve selected to adjust the audio filter parameter in real time while playback continues.

  7. When you’ve finished, release the mouse button to stop keyframe recording.

    The sequence continues to play, and the audio filter controls return to the previously set levels.

  8. If there are any other audio filter controls you want to adjust at this time, repeat steps 3 through 7.

  9. When you’ve finished making adjustments, stop playback.

After you’ve finished adjusting one audio filter control, you can move the playhead back to the beginning to record automation for other controls. The changes you’ve already made play back, so that you can make further adjustments in relation to those you’ve already set. In this way, you can continue layering automation using different audio filter controls until you’ve adjusted the filter to your satisfaction.

Note: You can also make changes to clips with filter parameters for which you’ve already recorded keyframes. New changes made to audio filter controls overwrite previously recorded keyframes.