Can anyone tell me why the time and pitch machine works on some audio files but not on others? It has always worked for me but now when I open Sample Editor â€“ Factory â€“ Time and Pitch Machine is grey and canâ€™t be clicked on. This file was aac., I switched the format to mp3 and also to wave, but no success. Maybe it is something other than the format of the audio file? Thanks for you time and consideration!