Joe Subich, W4TV
lists at subich.com
Sun Apr 21 18:12:42 CEST 2013
On 4/21/2013 11:46 AM, Bob Wilson, N6TV wrote:
> The main issue with Windows Vista, Windows 7, and Windows 8 vs.
> Windows XP is sound card latency when using the Win-Test "Internal
> sound card" voice keyer (DVK). The traditional practice of plugging
> your microphone into the sound card mic. input and monitoring your
> audio in real time only works well with Windows XP and earlier. A few
> sound cards have a setting that avoids the latency in the mic.
> monitor, but most do not.
Latency comes down to two items - 1) does the sound card have
hardware (analog) monitoring capability (those that do will
generally show a "microphone" control on the "Levels" tab for
the output device in Windows Sound Control Panel) and 2) Will
Vista/Windows 7/Windows 8 allow you to access/control it.
For devices that lack a hardware monitor, it is possible to minimize
latency by careful choice of sample rates *and* data formats for the
sound card microphone. Lower sample rates, lower numbers of bits (8
vs 16 vs. 24), and less compression will all reduce latency when the
monitor must be done via digital loop (no hardware monitor or
monitoring on a separate sound card). Careful parameter adjustment
and attention to software priority can often get the monitor latency
below 100 ms which is, in most cases, low enough as to not be a
... Joe, W4TV
> When using microHAM products, this should not be an issue if you route your
> microphone directly to the radio (except when recording messages).
> Using fixed IP addresses is only helpful for debugging network issues using
> operating system commands like "ping". I'd actually recommend that all
> computers in a M/M network try DHCP first, *not* fixed IP. Only switch to
> using fixed IP addresses if there is a problem that cannot be resolved.
> DHCP makes it much easier to swap new computers into and out of the
> network while you are contesting, since Windows will do all the network
> configuration automatically.
> Bob, N6TV
> On Sun, Apr 21, 2013 at 3:16 AM, Tonno Vahk <tonno.vahk at gmail.com> wrote:
>> I decided to follow the advice from several helpful people and build my MM
>> network of up to 15 computers based on stationary desktops with wired cat6
>> ethernet and fixed ip addresses. Hopefully that is as good as it gets. I
>> was offered used desktops with Windows 8.
>> Is this a no-no? W7 has been running fine for me so I do not wish to go
>> back to XP. Is there a reason I should avoid W8 and prefer W7?? Are there
>> any known compatibility issues with WT and/or Microham products?
>> Support mailing list
>> support at win-test.com
> Support mailing list
> support at win-test.com
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