This Is A Test (Acapella) Armin van Buuren

Ladies and gentleman
We are experiencing technical difficulties
Warning: This is a total blackout
Please stand by as we are currently testing our systems

Testing lighting equipment: LED screens
Testing blinders
Testing lasers
Testing 3D video
Testing pyro-technics. Stand by
Ok - We are about to do a full-frequency sweep

Twenty hertz
Fifty hertz
Two hundred hertz
Four hundred fourty hertz
One kilohertz
Two kilohertz
Five kilohertz
Ten kilohertz
Ok - Subwoofer kick test
Balance check:
Left channel - The sound should now be at the left speaker
Right channel - The sound should now be at the right speaker

Left channel
Right channel
Left channel
Right channel
Left channel
Right channel
Left channel
Right channel