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.

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.

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.

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.

   Sensitivity

   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.)