"I think I mentioned this in the past, but we're really working to change the fundamental way that the engine sound works," Yamauchi said in a press event at Polyphony's offices in Tokyo. "Right now I have a feeling that it might not make it for day one for GT6."
There's still hope that improved audio will be patched in at a later date. "There's a good possibility that we might do this," Yamauchi said when pressed on whether it'll be part of the post-release support, and Gran Turismo at least has good form in this regard - Gran Turismo 5 benefited from a series of updates that resulted in
a much improved version 2.0."