[Skimmertalk] CW skimmer audio output stutters under load

[Bob Wilson, N6TV]

On Sun, Aug 16, 2015 at 12:29 PM, bubnikv . <bubnikv at gmail.com> wrote:

> On that 2007 laptop, if I set the maximum number of decoders to 50, I
> elevate the process priority using the Task Manager to High and the CW
> skimmer is the only application loading the computer significantly, then I
> get no drop outs and the CW skimmer is usable as a receiver. That is, after
> I disabled the WiFi driver, which was introducing regular latency spikes.
> With 50 decoders, the two core machine has one core loaded to 50% (CW
> Skimmer is single threaded only, it will not load the other core).
>

When I play back a recording with CW Skimmer, and look at the Windows Task
manager, I see both CPUs being loaded equally (PC has an Intel Core 2 Duo
processor).


> It seems to me though that the CW skimmer audio filter is sharper and rings
> significantly more than the filter of the Rocky SW.
>

What CW filter width are you using?  From the CW Skimmer help text:

"CW Filter has a bandwidth continously adjustable between 20 and 700 Hz.
The green rectangle on the frequency scale shows the boundaries of the
filter passband.

"To change the filter bandwidth, press the Ctrl-Up and Ctrl-Down arrow
keys, or turn the mouse wheel, or drag the green rectangle with the mouse
in the vertical direction."


Thanks for the tip to manually limit the number of decoders.  That does
indeed make the audio much less glitchy (but sill not perfect).

73,
Bob, N6TV