Re: Outputting multichannel sound through the optical link??
Re: Outputting multichannel sound through the optical link??
- Subject: Re: Outputting multichannel sound through the optical link??
- From: Brian Willoughby <email@hidden>
- Date: Wed, 10 Feb 2010 20:22:51 -0800
On Feb 10, 2010, at 19:18, Philippe GRUCHET wrote:
Being mostly a musician playing concerts with a software setup on a
Mac Book Pro, I'm going to play with the StringPort by Keith
McMillen Instruments with its USB2 output to my MBP: <http://
www.keithmcmillen.com/products/stringport>
Is it then possible to output the processed hexaphonic signal (that
is 6 multi-mono channels, 1 per string) from, say, "AU Lab" to
another USB2 bus to send these 6 channels (separate, surround?)
into an HDMI audio receiver?
If yes, what receiver would you consider for a live setup?
If you are in a live setup, then my experienced recommendation is
that you completely avoid home theater surround technology such as
HDMI and consumer surround receivers. They're totally inappropriate
for your needs.
There are many, many, many CoreAudio-compatible audio interfaces
which support 6 or more separate channels. There are a few USB2
devices, but even USB Full Speed (1.x or 2.x) can handle 6 outputs at
once. Even better, there are many FireWire audio interfaces with 6
or more channels.
Apart from the latency which is an inherent part of the StringPort,
your software, and the output audio interface, you should have no
problems.
Just stay away from HDMI. It is not designed for professional or
live music.
Brian Willoughby
Sound Consulting
P.S. If latency does become an issue when adding up the StringPort,
USB2, software, and output interface latencies, then you might
consider using one of the Metric Halo Labs MobileIO FireWire audio
DSP interfaces like the 2882 or ULN-8 to take the Poly Inst "Y" Out
from the StringPort (using a custom cable) into the MIO for low-
latency processing in the box. You can control these DSP effects in
the MIO from your MBP without the added latency of sending the audio
to and from your computer. But there may be effects available only
in host software like AU Lab which are not available in MIO, in which
case you're stuck with the added latency.
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