On 04/16/2014 02:54 AM, Gene Heskett wrote:
On Wednesday 16 April 2014 08:44:15 david did opine:
On 04/15/2014 03:17 AM, Len Ovens wrote:
On Tue, 15 Apr 2014, James Mckernon wrote:
On Mon, Apr 14, 2014 at 2:06 AM, Len Ovens <len@xxxxxxxxxxxxx> wrote:
I would realy like to stay away from having to use a USB or FW
audio IF. In fact I would like to be able to continue to use my
delta 66 for as long as I can before I spend more money :) The
Thanks for the useful info in your post. Just to be clear on this
part: are
you saying you don't want to switch to USB/FW solely because you want
to keep using your delta 66, or because you have some definite
preference for
PCIe over USB/FW devices? If the latter, I wonder why?
USB in audio is limited. Getting clear USB ports interrupt wise is not
easy. Audio can not be on a hub or share it's usb with anything else,
but many new MB have no mouse or kb port so the USB is already being
used for that much. The real reason though, is latency. With the pci
the latency can be 1/4 what it can be in USB or FW. That is the
lowest seeting jack for USB or FW is 64/2, but I can run the d66 at
16/2 with no problem on a well tuned system. This does make a
difference for live work. I know that 64/2 seems like very good
latency (it is) but remember that the card then adds another ms in
each direction as well as the stage distances on top of that. That is
the time it takes the sound to reach my ear after going through the
computer as a processor and then through the air to my ear. Maybe
that is still not worth worrying about... but even with 30 feet of
cord and no digital delay, I can hear the delay from my playing to
the sound reaching my ear.
Interesting. What is the difference between speed of sound in air and
the speed of electricity through a cable?
Sound is nominally 720 miles per hour. Rather leisurely IOW.
A perfect cable is C speed, 258 times faster. But cable (coaxial) actually
range in speeds between 66% of C for home usable cables, to around 98% of C
for 9" diameter high power broadcast stuff, C being 186,272 miles per
second in a vacuum. Thats 298,035.2 kilometers per second for the metric
folks here.
Then running your sound from stage to backhouse sound board back to
stage and hearing it through headphones would give no latency at all.
--
David W. Jones
gnome@xxxxxxxxxxxxx
authenticity, honesty, community
http://dancingtreefrog.com
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