India, Sept. 23 -- There's nothing quite like hearing your favourite song or a crucial movie scene with sound that actually does it justice. This Amazon Great Indian Festival, the deals on audio gear are the real headline. Sonos speakers and soundbars are famous for their Dolby Atmos layer and that proper, room-filling sound and are finally within reach for many. You can swap those "just about okay" TV speakers for a Bose soundbar and actually get lost in a late-night binge, or grab a Sony wireless neckband to turn your commute into something you look forward to. During this Amazon sale, each upgrade delivers the kind of detailed, full-bodied audio that usually comes with a fat bill but right now, it's all up to 80% off. Truth is, these f...