Just what the title said.
There was a utility on the driver CD which had a setting to redirect output to internal speakers, but it's quite old and is installed as a part of old drivers, so I'd like to avoid using it (or at least the outdated version) and there seems to be no new version available.
I'm using windows 7 64bit and drivers which came from windows update. They came with few utilities, but not the one I was looking for.