Thomas Brandon <tom@PSY.UNSW.EDU.AU> writes:
> I read a FAQ on digital audio that stated that AES/BEU and SPDIF were not
> convertable. Yet, the only differences I could see where:
> 1) Voltage levels
>     SPDIF is much lower voltage level (very easily wrong).

Somewhat.  I've seen people wire them together with no problem.  But it
would be nearly trivial to interface them if they don't work directly.

> 2) Protocol
>     The framing is different. One uses one more bit for it's protocol (not a
> data bit).

The framing is the same.  The interpretation of the C (channel status) bit
can be either "consumer" or "professional", depending on one of the C bits.
The IEC 958 spec defines both.  Some devices don't pay any attention to the
C bit anyhow.  In my (limited) experience, the only problem with having the
wrong C format is that a consumer DAT recorder with SCMS will assume that the
digital input is copy-protected.