Nurburgring Exhaust Sounds Distorted...

[uberslug]

Just tried the Nurburgring NDS Track and both the Moto2 2017 and CBR600RR sound like they are misfiring. Anyone have any idea why? This is the first track where I have been able to complete five laps without crashing right off the bat [I am sure my lap times were shite, but, hey, I usually crash in the first turn of most tracks no matter how slow I am going].