I am trying to hook up the Macbook Pro's optical output to a Crane Song Avocet. I have a few questions and concerns: First of all, I am using a mini-toslink to toslink cable going into a toslink optical to spdif coaxial converter (said to be bit-transparent). Now, my concerns are regarding real time sample rate conversion on output, digital attenuation causing distortion, word length truncation, etc. Bit transparency is crucial. My other concern is whether or not I will be able to sync to an external clock. Any insight on this would be very helpful. Thanks.