I have a speaker called Libratone that comes with a dongle for iphone/ipad etc and one for USB for PC's/Mac. When I connect it to my PC with windows 7 the sound is extremely high... event at 1% out of 100% its really loud! I also tried it on my laptop(windows7) and the result is the same. Tried it on my girlfriends laptop and it work perfectly sound is balanced and correct. But not on windows7. Any suggestions?