I liked the JJC sound.
My boat has 2 seperate RAM gas engine modules that are each, seperately, tuneable for the idle rpms and idle volume.
Each module is also adjustable for maximum rpms and volume.
As a result, I have the engines synched at idle and at FULL they are going in and out of synch about every 1.5 seconds.
At WOT, they really are laboring with a synch rate of 4 seconds. It actually sounds like they are being worked to death and no one cares.
A couple of PTB Motor Mechanics said they moved the governors up to 3,200 rpms just before bad missions.
I moved mine up to 3,200 rpms also.