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cable length needed to create phase shift?
In article
(Patrick) writes:
how much of a difference in cable length would it take to create a
noticeable phase difference between two signals coming from the same
source simultaneously? i.e., wouldn't a 1000' xlr cable arrive at the
pre, recorder, etc. much later than the signal that only had to travel
through a 25' xlr cable?
thanks,
patrick
At the velocity electrons travel in metal (nearly 186,000 miles/sec or almost a
trillion (10^9) feet/sec), that length difference wouldn't matter.
A 20 kHz sine wave would have a wavelength of about 50,000 feet, or nearly 10
miles. So a 1000 foot difference in path length would produce about a 7 degree
phase shift at 20 kHz.
(Somebody check my math, please: that sounds like more than I expected.)
-Jay
--
x------- Jay Kadis ------- x---- Jay's Attic Studio ----x
x Lecturer, Audio Engineer x Dexter Records x
x CCRMA, Stanford University x http://www.offbeats.com/ x
x-------- http://ccrma-www.stanford.edu/~jay/ ----------x
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