About Refining Loops

The Loop Tweaker tool allows you to refine a region of audio for seamless looping. Use the Loop Tweaker to tweak an existing loop selection so that it loops perfectly or use it to create a loop from material which is not perfectly suited to create a loop.

You can automatically detect loop points by scanning the area between two loop markers. You can specify parameters that determine how accurate the program should be when suggesting loop points.

If the automatic search for loop points is not successful, you can process the waveform to allow for smoother loops by crossfading areas of the waveform close to the loop start and end points.

To use the Loop Tweaker, you must first define a loop using a pair of loop markers.

Loop Points Adjustment Tab

Use the Loop Points Adjustments tab in the Loop Tweaker dialog to manually refine a loop selection by dragging the waveform to the left/right or by using the automatic search buttons to find the nearest suitable loop point. The aim is to align the waveforms so that they meet at a zero-crossing point where the waveforms match as closely as possible. When you adjust your loop start and end points in the dialog, the start and end loop markers in the main waveform window adjust accordingly. Note that this movement may not be visible depending on how much you move the markers and on the zoom factor that you have selected.

It may be helpful to activate Loop on the transport bar during playback so that you can hear the difference when you adjust the loop markers. If you are not using a crossfade or post-crossfade, you do not have to click Apply when tweaking loop points. You can also leave this dialog open and manually adjust the position of the markers in the main waveform windows.

Crossfade Tab

This tab allows you to apply a crossfade between the audio at the end of a loop and the audio at the beginning of the loop. This can be useful to smooth the transition between the end of a loop and its beginning, especially when you use material that is not perfectly suited to create a loop. Use the envelope drag points or value sliders to adjust the crossfade envelope. Click Apply to create the crossfade.

Post-Crossfade Tab

This tab allows you to apply a crossfade at the end of the loop by mixing a copy of the loop back into the audio. Use the envelope drag points or value sliders to adjust the crossfade envelope. Click Apply to create the post crossfade.

Post-crossfading means crossfading the loop back into the audio after the end of the loop so that there is not glitch when playback continues after the loop. This is done by mixing a copy of the loop back into the audio.