As many of you have been asking, here are some explanations about the optical interface and cable on Jambadoo. Jambadoo has a 3.5mm Jack interface that can output analog and optical. This is the same interface that you can see on the Macs (Here and details here on the first icon). So we use one interface for both Optical and Digital. It can be used with a standard 3.5mm Jack for normal Audio output. But it can also be used for Optical (SPDIF) out as shown in the pictures below. This makes Jambadoo smaller and more compact. Thanks.