E-MU 0204 USB 2.0 - Manual (Page 23)

Adapter Cables
0204 USB Owner’s Manual 23
ADAPTER CABLES
1/8” Headphone to 1/4” Headphone Adapter
TIP
RING
Stereo Headphone to 2 x 1/4” Jack Splitter Cable
This type of adapter allows you to use the Headphone jack as another pair of line outputs.
The tip and ring of the headphone plug are split off into separate outputs.