Seems like can turn off the Active Sound Control?! I assume that's the speaker that goes Vrrooommm.
At the 6:30 Mark thereabouts he even says there is some de sync between sound and actual rpm. Off by 0.5s, which he realised only when editing the video.
According to the (dodgy) translation, can be turn off at the dealers, at least in JDM land I guess.