I bet that is looooouuuuuddddd....
For me, this almost made me choose the RSV4 instead of the Pani, except DNA's incentives on leftover 2012's were too strong:
Aprilia RSV4 @ Andreadis Dyno. - YouTube
Sound is a major component of the riding experience for me, I even bought a Crossplane R1 just because of what it sounded like with a Graves full exhaust.
I posted this video in my introduction post, but since the topic of sound came up, I thought it might be relevant here. The Crossplane howl at Daytona is one thing I miss - looking forward to re-making this video on the Pani:
Crossplane R1 at Daytona International Speedway - YouTube