I'm having an issue so strange and it only started aweek ago

I'm having an issue that is so strange and it only started about a week ago, Ive been reading forums, trying to find out why it would be, googling everywhere, seemed to something in common that it may be viral, well it 4.30 am here in New zealand, and Ive been trying to get to the bottom of this for just over 48 hours, searching right through my darn computer, and nothing, zero, trying silly things to stop it and thelast thing I tried just before was disconnecting everything from the case, and you wont believe it, I swear it was still playing, my flatmate in the next room had a device given by the health services called a continous air pressure machine that hooks up every night when retiring, and I went into check on her cos I heard her cough, as I always do, and the very same that was playing in my room from my"should be very asleep but isn't" computer, Billy Joels Honesty, was also playing ptretty much the very same level in complete synch from this machine, I swear, and she was gibven this machine a week ago, when mine started doing this, I dont like things that baffle me too much, the coincidence of that machine arriveng that plays music, and mine starting to do it at almost the same volume, he has me unable to sleep, cos that machine is not connected to any network, only a power socket to power it???? how could this be? I truly can't sleep as it was only earlier tonight I heard it, she is able to dissconnect from it and she did wake so I asked if she would turn it off for a minute a minute and she did and the machine went silent, I had mine totally disconnected from any power source apart from, of course the tiny power source in a computer for over an hour and it stilled played, what do think could possibly be up with that? the other thing tghatis so bizarre is that every now and then, in the middle of musig, an odd sound, louder than it is heard, it's like someone going "ug, ug, ug", its quite unsettling sound, I'm beside myself what the is going on here am trying to see if anyone on this planet has had anything remotely close, and again I swear Im not insane, although it sure sounds it I know, lol