First, get an external sound card. If you are using a laptop, the noise that is generated within the unit is horrible. I have seen a Beringer external USB sound card (RCA
Line level in and out appx. USD $30) in use without a DI or any other ground lift methods and it worked and sounded way better then the high imped. output of the headphone jack. Plus all of the extra "computer related" noise was not there.
http://www.behringer.com/UCA202/
Personally, by the time you make the cable and buy a decent DI you could most likely pick up something like the MAudio 410 on ebay.
http://www.m-audio.com/products/en_u...e410-main.html
We use the 360 a lot. It is very frustrating that the thing can't be hooked up to a computer like an external HD. That way you can transfer audio files directly into it. We never have the same one twice in a row. Every show we have to reload all of the sounds into it. It has an
AES input but everything is freaking real time. Most people I have seen are switching away from these in favor of a computer based solution.
kw