Change Speed
Change Speed works by resampling the audio, so affecting its ability to carry particular frequencies. For example, the more you slow down the audio, the more of the higher frequencies will be removed, making the audio sound "duller".
To change the tempo of a track without affecting its pitch or the range of frequencies it can contain, use or .
Percent Change
If you know how much you want to change the speed of the audio in percent, enter that value here. You can also drag the slider to choose a Percent Change - the input box will update as you drag the slider.
Standard Vinyl RPM
If you have a recording of a record that was played back at the wrong speed you can correct that using these two popup menus. In the from popup choose the speed the record was played back at; in the to popup choose the speed is should have been played back at.
