Install Sound Card
Install the sound card to the computer. Read the manufacturer's manual that came with the sound card and follow the directions. Once installed, make sure it's working properly by inserting a CD into your CD or DVD-ROM.
Connect Cables
With the mixer off, take the ¼ inch ends of the cables and insert them into a stereo input of the mixing console. These are marked on the channel as being 5/6, or 7/8. The cable ends should be color coded to make sure the inputs and outputs stay consistent.
Connect The Y Adapter
Take the other end of the cables and insert them into the Y adapter.
Plug In The Y Adapter
Connect the ? inch plug into the speaker output on the sound card. This is color coded green.
Adjust The Volume
Turn the volume all the way down on the channel on the mixing console. Insert a CD or play a file on your computer. Slowly turn the volume up to desired level.
To record, turn down the console volume. Unplug the adapter from the speaker input and switch to the mic input. This is color coded red. Switch the console cables from the input to the outputs. plug and instrument into your mixing console. Adjust the volume to the desired level.