Not as crazy as it sounds. The audio team for this game do a sensational job, there is an incredible amount of detail in thr audio throughout the game - just put your cursor over the various planet types in the system map, and you'll quickly realise that they all have signature audio tracks. Dropping out of SC in front of an ELW, and listening to it is quite incredible.You know - a while back, and I can't remember the system unfortunately, I remember sitting in supercruise and there was no music but whenever I pointed in a certain direction it made a weird noise. Actually thought it was a bug.
Probably there's nothing in this and it was me just going mad but maybe listen out for directional noises.
Of all the possible hints, this is the one I'd be paying most attention to.