I think it's because the change in how the car engine noise generated by GT4, to worst. I am annoyed with how the engine noise of different car sound closely the same, especially at high rpm. I think this is programmer's fault, since GT4 may use the same sound data from GT2 too.
I really amazed with GT2 cars sound, stock muffler only, where no corvette or altezza or anything sound exactly the same. Car with the same engine with different displacement will sound different. Same car with different engine will sound different.
But all this from playing it with epsxe + P.E.Op.S. DSound Audio Driver. I forget how it sound from the real console.
Just few days ago I cruising along in autumn ring driving S2000 with manual and drive like how I would drive at real street. 65 mph max, shift up at 4000rpm, cruising at 50mph at 6th gear, bass and treeble at max. It make deep bass sound at low rpm, grunt at high rpm, it really sounds like Honda 👍. I drove around few laps just to hear it's sound
, forgetting that I actually want to tune this car for race ..........
Is it just me that feel GT4 engine noise sounds more like GT1 ?