![]() If more than one track is selected, the selected region in the next selected track will fade in. The selected region in the first selected track will fade out. In the unlikely event that both ends of the selection are exactly the same distance from the ends of the selected audio clip, the effect will fade out. Conversely, if the end of the selection is at or near the end of the selection, and the start of the selection is not at or near the start of the audio clip. If the start of the selection is closer to the start of the selected audio clip than the end of the selection is to the end of the audio clip, the effect creates a fade-in. The automatic setting is based on the proximity of the ends of the selection to the ends of the selected audio clip(s). If you get a fade-out where you want a fade-in, or vice versa, then undo the operation Ctrl + Z and use one of the other two choices listed below. This is the default and will usually give the correct result. The effect will attempt to automatically work out whether a fade-in or fade-out is required. When set to the half way position (0.5), the fade is approximately a "constant power" type curve, and will usually maintain a fairly steady volume throughout the crossfade. The overall volume is likely to be noticeably higher during the crossfade period. At maximum (1.0), the upper track will maintain close to full volume until close to the end of the crossfade, and will then fade out rapidly, while the lower track will fade in very rapidly to almost full volume. High settings are useful if you want both tracks to be strongly present during the crossfade time, though it is not likely that the maximum setting will be often required. When set to zero, the crossfade is effectively the same as the "Constant Gain" preset. When enabled, it controls the curvature of the fade in a similar way to the "curve" control on a DJ mixer. This text box / slider control has no effect unless "Custom Curve" is selected as the "Fade Type". This option enables the "Custom Curve" slider control, which allows the rate at which the tracks crossfade to be manually adjusted. The preset options will cater for most crossfading tasks, but if fine control over the effect is required, the custom curve option may be useful. This version is based on the legacy "Cross Fade In" and "Cross Fade Out" effects of previous versions of Audacity. This variation of the constant power fade starts to fade in a little more rapidly than "Constant Power 1" and the crossfading may sound a bit abrupt in the first or last moments of the fade, though it may be preferred when crossfading songs that are beat-matched. "Constant Power 1" is generally a good choice as a general purpose crossfade effect.Īs with "Constant Power 1", this option is also designed to maintain a fairly constant volume through the course of the fade. "Constant Power" fades combat the tendency of the volume dipping, so will often be the preferred choice, though care needs to be taken when using this type of crossfade as the peak level may rise during the course of the fade. However, "Constant Gain" crossfades may cause the overall volume to dip slightly during the fade. ![]() "Constant Gain" ensures that, as long as the original audio is not clipped, the crossfade will not clip - this is the default. It fades out the upper track, and fade in the lower track with linear fades (the same type of fade as is achieved by using the Fade In / Fade Out effects). To apply a simpler (non-configurable) crossfade between audio clips on the same track, see Crossfade Clips. Select the overlapping region in both tracks (see example below) and apply the effect. The tracks should be positioned with the track to be faded out above the track to be faded in, and with the start of the lower track positioned before the end of the upper track so as to create an overlap between them. Use the Crossfade Tracks effect to make a crossfade or smooth transition across two tracks.
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