qster wrote:
I found the below adapter on eBay, would it work to use it for connecting another computer to the mixer for either input or output ?
You really don't want to use the headphone jack on the computer as an audio output. It's designed for headphones. It will work, but won't sound as good as using a good soundcard or the mixers built in USB.
Also in theory the USB **should** be able to do both as far as playback and recording simultaneously, but don't quote me.