How do I crossfade two files?
Open two files and make sure they both have the same sample rate, sample size, and number of channels, but it’s not necessary. This example uses a cross-fade of five seconds, but you can use a different duration. Apply the Fade Out filter to the last five seconds of the first file. Apply the Fade In filter on the first five seconds of the second file. Select all of the second file and select Edit > Copy to put it on the clipboard. In the first file, click once at a point five seconds before its end, and use Edit > Mix Paste to mix the clipboard audio with the first file. The audio on the clipboard will be mixed on top of the first file starting from the insertion point, and the file will be extended to hold the new mix. By repeating this cross-fade on several songs, you can create a mix with seamless transitions between songs.