Vinyl, it's just more fun to me to manually go through a record searching for samples, plus I tend to analyze the music I'm listening to- like this Marvellet's record that had a sick arrangement.... I learn a lot from those records... But I will use MP3's if say an artist wants me to sample a certain song, and I don't have the record.....yet. So occasionally MP3 but generally Vinyl....
---------- Post added at 10:48 AM ---------- Previous post was at 10:45 AM ----------
Time it as you're sampling- like catch just enough to fit what you need....
Trim it....
Stretch/Pitch it to match...
Chop it up and use the pieces in tempo...
Change the tempo of the other stuff to match the sample....
Any of those should work