Re: I/O device with multiple *independent* SPDIF ports?
Re: I/O device with multiple *independent* SPDIF ports?
- Subject: Re: I/O device with multiple *independent* SPDIF ports?
- From: "Mikael Hakman" <email@hidden>
- Date: Wed, 23 Jan 2008 15:29:29 +0100
- Organization: Datakonsulten AB
Stephen Davis <email@hidden> wrote:
That's cool but I still need a switcher. I found a 4-port one here that
looks promising, esp. because it has RS-232 control support for changing
inputs. Hook that up in front of an RME FireFace 800 and now we're
talking. :-)
http://www.inday.com/da4x/da4x.htm
That's cool too! But if you hook up this one to FireFace:
http://www.rme-audio.de/en_products_adi_4_dd.php
Then you have a complete mixer surface in your Mac. AES/EBU is compatible
with S/PDIF.
Going back to a previous question, yes the DD sync word is two valid
16-bit samples but the DD over SPDIF specification recommends searching
for 4 leading zeros first to reduce the likelihood of collision even
further. In practice (so far), I have not found the extended sync word
necessary.
Nice tip! They are obviously assuming that when the signal changes from PCM
to DD there will be a short silence before DD starts. Sounds reasonable.
When I searched for only sync word, in a normal PCM stream, I got match now
and then, about one in 1 minute on average. At least during that broadcast.
Regards/Mikael
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