I have my computer sound running into a Behringer 1204FX mixer, then into Logitech Z2200 system. When Bill was here yesterday, I discovered that if I turned down the input from the computer to the mixer, the vocals no longer sounded distorted.
I wasn't having this problem on any of my other music, so I must surmise that Bill's recordings are hotter than all mine, but not necessarily over the line, as I suspected earlier.
Anyway the songs sound quite good now.
DonM