BIAS Peak can alter the pitch of an audio selection by as much as an octave up or down, with excellent results. To change the pitch of a selection, choose Change Pitch from the DSP menu or from the toolbar. Next, select the interval of transposition by entering a positive or negative value in cents in the "Change Pitch by" field. You can fine-tune the interval by entering additional positive or negative values in the "Fine Tune by" field. To keep the audio at the same tempo, click on the Preserve Duration checkbox.