I recently purchased a fifty dollar pack of vocals by singer "Veela" and they sound amazing, but I have a hard time adding them to my beat. The tempo is perfect and the timing is right but it's off note. Don't know if anybody will know what this means, but each of the sound files have letters and numbers before it, such as FDmCC9, I'm sure that has to do with the note that it is, but is there something that I'm missing. and im not sure what the numbers stands for. Thanks!