Interesting, though 5.1 does not necessarily equal better quality than stereo. If you truly record in 5.1 and you have a 5.1 speaker setup, then you could get some cool 3D audio. But, probably not from just the phone, it doesn't have a 5.1 output and I don't know if bluetooth audio supports 5.1. Maybe with a USB DAC. But from a PC with the appropiate connections sure. But 3D audio and audio quality isn't the same. And maybe stereo recording does use the different microphones for noise filtering etc so if it foes that's cool and helps with quality. though as I said in that other thread, the 5.1 microphones I've seen are quite expensive and much bigger than a cellphone.