On Fri, 07 Oct 2005 17:33:17 -0700, George
<george@nomail.com> wrote:

They're a direct line out, or can be looped into an input on
your sound card (or integrated motherboard sound). If your
sound card & driver cannot play back a sound card line-in
sound simultaneous to another wave file, you'd still have
the same issue.

Only if you plug it into a line-in on the sound card, unless
it's a winmodem that also has a digitized audio output to
the system over the PCI bus.

There might be a driver setting, different driver, or
windows audio related setting that allows both audio streams
to play back simultaneously. Offhand I don't remember
what/where the setting might be but maybe someone else does?