Consequently, I find myself using different "must have" areas of both audio programs, and one of them often visited is audio file cross-fading - something which is not present on the 2480 current OS at all.

So here is a "How-To" for that, using Sonar and its wonderful "auto-cross-fade" editing section.

Here is my stereo audio file. Actually, it's a finished song that needs cutting in one area, although it could well be a keyboard section that needs an area cutting out, and then re-joining so that any audible clicks or pops are done away with.

My track is running in perfect sync, and I need to cut out the section in between bars 14 and 15. Using the Snap To Grid option, I set it for half a bar and cut directly on 14.2.0.0

Once I am happy with the edit point, I make another cut at the start of bar 14, and erase the section that is not required.

As I want to create a perfect crossfade, I now have to bring up the Snap To Grid option again, this time choosing Absolute Time and set it to a 1 Sample ratio. This lets me drag and drop the right section of the audio file over to the left section, offering me a 1 sample grid movement for my cross-fade. That's what I call precision control!

Now it's just a simple case of clicking and dragging the right section of audio over the left section of audio. In Sonar, make sure that you have Auto Cross-Fade marked, and that when meeting each other, the audio files are marked to overlap each other. This causes the files to join one another in a perfect crossfade, and with the 1 sample ratio of grid movement, we merely have to move the right section of audio, monitoring each consecutive edit until we are satisfied with the result.

Here is my audio file, cross-faded and sounding really good!