Whining noise at 3100 RPM

[desertmike680]

Title speaks for itself. In any gear, when the engine is at 3100-3200 RPMs, it emits a whining noise. Anyone else experience the same issue and have any ideas what it could be?

 

[Blendercloud]

Sounds a bit like differential whine to me.

 

[LASERBLUE135]

Supercharger.

 

[amilliems6]

in every gear?