Obviously after hours of attempting to get this sound to playback I HAVE tried changing the various options of sample/bit rate (primarily 48 Hz) and frequencies, plus swapped channels, raised/lowered the bass and volume and created different audio file types - AIFF, MP3, WAV - but no joy. whatsoever.
I've never come across anything like this and I approached a pro sound mixer who is also stumped. its seems the frequency is too low to be heard by all speakers, but I need to find a way to remedy that.
Any ideas? I'd be REALLY GRATEFUL, as this project should be delivered 18th March 2014.