I need to loop a lot of recordings such that the loop is not clearly hearable. For example, I recorded some sounds in the forest and want to loop them such that I can fall to sleep when listening them. If the sounds simply start from the beginning the "loop point" is clearly hearable and annoying.
My first thought was to cut a clip in half, then start with the second half and let it end with the first half. Then I have some freedom in cross-fade the start and end strategically such that no obvious loop is hearable.
In practice though I believe this would not always work smoothly. For example lets say you have a track where you walk through the woods. When cross-fade over a period of 5 seconds, it would be hard to match/overlay the footsteps and other contents such that it doesn't sound like you're stumbling or running for a brief moment. If the cross-fade is too short, it would become more hearable (e.g. suddenly faster wind, or faster walking, other environment). But when longer, there are basically two recordings hearable at the same time for that moment.
Since this seems to be tricky, I wonder if there is software dedicated to deal with this problem?
For both Mac and Windows (to make this question more useful).