Actually, the delay to manually hit the PTT is much less than the delay
for the audio to get through everything, at least in my system.
I use teamviewer for rig control, and the delay between me clicking the
MOX remotely and keyup is usually less than 0.5 second. But if I start
talking at the same time I remote key the MOX, the audio doesn't arrive
for another 2-4 seconds. Thus, what others hear after the transmitter
keys up is whatever was in the audio pipeline 1.5-3.5 seconds *before *I
clicked the MOX button-- typically what is transmitted in those 1.5-3.5
seconds is the received audio coming through the remote station speaker
(computer speaker), or fan noise, etc. Headphones help minimize that
racket and confusion.
Teamviewer will control the remote computer - thus PSDR screen -- and
provides audio paths as well. However, Teamviewer audio chain seems to
have fixed buffers of about 4 seconds-- a terrible delay. I did find
that unacceptable. Plus their codex didn't provide good fidelity audio.
So I use Teamviewer to control the rig, and Skype for the audio paths.
Skype's audio delay is variable-- if it detects high internet packet
delay or jitter, it lengthens the buffers to minimize dropouts which
imposes the audio chain delay. If packet delay is low with low jitter,
Skype algorithms will shorten the buffers and audio chain delay. It
never seems to get lower than 1 second, but that is sooo much better
than 3-4 seconds.
I agree, working with 3-4 second delay really becomes noticeable. 1 or
1.5 second we have learned to live with. I share my Flex with several
remote users, and use it frequently myself while on trips, and we all
get the 'nack' of operating with the delay. Some of my users can even
start talking about a second before they hit the MOX and that audio
arrives just after the transmitter lights up.
Technically, it is variables in packet transit time that forces the VOIP
algorithms that require audio chains to use long buffers. Can't blame
Skype. Actually, Skype does a terrific job considering the packet
transit variables of the internet with millions of users, many on crappy
connections.
Steve WA7DUH
On 8/5/2011 11:23 AM, Dr. Howard S. White wrote:
I really wish someone could make Skype trigger the VOX ...
The delay to manually hit PTT is unacceptable...
__________________________________________________________
Howard S. White Ph.D. P. Eng., VE3GFW/K6 ex-AE6SM KY6LA
Website: www.ky6la.com
"No Good Deed Goes Unpunished"
"Ham Antennas Save Lives - Katrina, 2003& 2007 San Diego Fires, 911"
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