Time-stretching the samples you have used in Edison is arguably the most enjoyable and rewarding process, especially for remixers and mash-up producers. This doesn't necessarily have to be a sample from a commercially released song. You can also be working with percussion, drum, and audio loops of all sorts. Anything that has a detectable rhythm is fair game. The pitch of your sample, the embedded tempo of your sample, and the main project tempo in FL Studio are all related. This recipe will break down what this means.
To time-stretch your sample from Edison to your FL Studio project tempo, you must have your tempo embedded in your sample. Once this is done, you simply need to have your sample exist in a channel on the step sequencer. This is extremely vital to working with your sample and getting the best out of your project. If your tempo is not embedded in your sample, these steps will not work.