BIAS Peak LE 4 ( Macintosh ) Advanced Digital Signal processing(DSP) tools with options like Fade In/Out, Normalize, Gain Envelope, Reverse and more Fast &amp; intuitive waveform editing for better &amp; easier sound design Unlimited undo/redo functions with edit history for easier management Better mastering is here with Sqweez, the new compression &amp; limiting tool The sample-based ImpulseVerb technology takes reverb to a higher level