You can apply a crossfade effect both to visual and audio files. It makes the transition between the merged snippets smoother.
While the sound and/or image at the end of the first file is gradually fading down, the sound and/or image at the beginning of the second one is fading up simultaneously.
You can apply crossfade in the following tools:
By default, if there are more than two files, crossfade duration is set to 3 seconds for each of them. We recommend using this effect for merging the snippets which are longer than 3 seconds.