Create and optimize loops

Audio that loops seamlessly creates a perfect soundtrack for many Flash animations and video spots.

Create a loop

  1. In the Tasks panel, click Create Loop.

    In the transport controls, Soundbooth automatically enables the Loop Playback option .

  2. Press the spacebar to start playback.

  3. In the Editor panel, select a time range for the loop.

  4. In the Tasks panel, fine-tune the Loop In Point, Out Point, and Duration settings.

    Click the Previous Beat and Next Beat arrows to quickly adjust the selected range. Click the zoom icons to magnify related audio.
  5. Select from the following options:

    Lock Duration
    Restricts the loop to the currently specified duration. If you need a loop of precise length, select this option. Then manually adjust the in point and out point, or click the Previous Beat and Next Beat arrows to automatically jump from one potential loop to the next.

    Show Beat Indicators
    Displays beats in the Editor panel. (If beats are densely spaced, an orange gradient appears at the top of the waveform. To see individual beats, zoom in.)

  6. Click Save Loop As to save to a new file.

Smooth out loop transitions

By default, Soundbooth transitions from loop out points to in points without cross-fading. That default works well for percussive sounds, but more sustained sounds benefit from a smooth cross-fade.

  1. In the Create Loop task, expand the Settings section.

  2. Select Auto-Smooth Loop Point.

Preview only loop transitions

By default, Soundbooth previews the entire loop. To precisely fine-tune the transition from out point to in point, preview the transition instead.

  1. In the Create Loop task, expand the Settings section.

  2. Select Play Transition Only.

Adjust beat detection settings

  1. To display beats in the Editor panel, choose View > Beats.

  2. To fine-tune beat detection, choose Tasks > Create Loop. Then, in the Tasks panel, expand the Settings section and adjust the following options:

    Minimum and Maximum Frequency
    Specify the main frequency range that beats occur in. The fundamental frequencies for bass drum, for example, range from 40 to 80 Hz. By contrast, snare drum emphasizes frequencies from 1,000 to 2,000 Hz.

    Detects main beats at low settings, and adds intermediate beats at high settings.
    Appropriate frequency and sensitivity settings depend upon audio content. Experiment with different settings while viewing displayed beats in the Editor panel.

    Tempo-Based Detection
    Adjusts beat placement to better reflect rhythmic, musical patterns.

Beats in the Editor panel

To display beats as simple lines without orange semicircles, deselect Use Gradients in the Appearance preferences. (See Change interface brightness and colors.)