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Computer Audio Asylum Music servers and other computer based digital audio technologies. |
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In Reply to: Sound Advice posted by fmak on November 24, 2014 at 22:58:24:
"Wireless can cause latency spikes of 30000 uS!"
I've observed similar (or worse) delays establishing a Windows remote desktop connection from the measured computer to another computer. From the way this happens, it looks like this is due to execution of cryptographic calculations. (These are probably done at high priority so that the memory residence of key material can be minimized, a policy that may be good from a security perspective, but is terrible from a real time perspective.) I assume that similar considerations occur with wireless. In addition, many inexpensive wireless adapters rely heavily on the CPU to perform various processing associated with managing the radio.
It is best to have no wireless equipment on an audio computer, but if wireless is needed for reasons of physical cable wiring, then one can get an outboard wireless bridge that has the radio function and connect that via a short wired run to the audio computer. This will remove all the radio processing from the audio computer. However, it will not give the low latency that the wired connection provides, so if you are streaming audio over the network this may be problematic. Normally the latency is very low with a Wireless N connection, but sometimes it will go up to a second, as can be seen by ping tests. There are, of course, other potential negative impacts on sound quality from wireless equipment near audio equipment and possible negative impact on health from wireless equipment near people.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- RE: Sound Advice - Tony Lauck 11/25/1407:27:07 11/25/14 (0)
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