Tony Iommi confessed in many interviews that he really likes jazz. There are uncountable songs in Black Sabbath’s career that we can actually note it, but most people never thought one of them would be ‘War Pigs’ even though feeling something strange with the drums. This something strange is the cadence which is 9/12, if memory serves me right, a cadence that bluesmen and jazz players use a lot.
Here, Andy Rehfeldt transposed the tone, which was Em (E minor) to Bm (Si minor), tamed the main guitar riff cleaning it and maintained the drums cadence.
The outcome is very interesting. Watch it here: