Hello, First time poster. I have a 2.1 speaker system from Altec Lansing (Octane 7 - VS4621 )connected to my computer. Recently, the voices in music and videos has become muffled. The strange thing is that the music in the background sounds almost perfect. I also have realized the bass has gone silent. Now, sound works perfectly when headphones are in the computer or on a TV via an HDMI cable. The muffled voices/no bass also occur when I plug the speakers into my iPod. So I believe I have isolated the problem to the speakers. What can I do to remedy this problem?