It could very well be some phasing trick buy the engineers.
Try switching the interconnects so that the sounds would be coming from the left channel....if it's there in the left also, then it's on the recording. Don't laugh folks, I remember hearing Jimi Hendrixs' "Electric Lady Land" the first time on a top setup and was simply blown away by having his guitar come from the back of my skull and swirl around. Un*&@ing believable! Phase tricks like the one Kubla describes are actually not that uncommon in recordings these days. Just listen to Madonna's "Ray of Light" album.....
Try switching the interconnects so that the sounds would be coming from the left channel....if it's there in the left also, then it's on the recording. Don't laugh folks, I remember hearing Jimi Hendrixs' "Electric Lady Land" the first time on a top setup and was simply blown away by having his guitar come from the back of my skull and swirl around. Un*&@ing believable! Phase tricks like the one Kubla describes are actually not that uncommon in recordings these days. Just listen to Madonna's "Ray of Light" album.....