What is this effect?

tendollars

New Metal Member
Jul 18, 2014
1
0
1
Hi,

A friend of mine has recently noticed the effect at 2:41.

If you listen to that with a subwoofer, you'll hear something like a powerful wave, can't really explain that. We thought it was the bass guitar, but we're not sure. What is this effect and how is it done?

Thanks!
 
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