From Disney Blog...
More people than ever will be able to join in the party, too, as the parade is presented up to twice daily along the new, longer Disney California Adventure park parade route, winding from the Twilight Zone Tower of Terror in Hollywood Pictures Backlot all the way to Silly Symphony Swings on Paradise Pier.
It will start at Tower of Terror, make its way down Hollywood land, through BVS, up toward Paradise Pier (through the large pathway, passing by Cars Land) and ending at Paradise Garden Grill. Soundsational is a 24 minute parade, so Pixar might be 30-35 mins