Markus Vester wrote:
Dear LF,
I have recently installed WSPR 2.0 on one older XP machine and found
that decodes were erratic, and the frequency readout was about 10 Hz
high. The reason seems to be that the input samplerate is about 0.6 %
low. The output samplerate is however correct.
The strange thing is that this samplerate error was not present with the
former version 1.12. I now have the two versions running simultaneously
side by side, on the same machine with the same soundcard. WSPR 1.12 is
producing perfect decodes on the correct frequency, whereas 2.0
reproducibly shows the described effects. It looks like the new version
somehow accesses the soundcard differently.
Has anybody else experienced this?
Out of my fuzzy memory, I seem to recall that Joe changed the sampling
frequency of WSPR to 48 kHz
(don't know what it was before), I think to better interface with VAC.
But don't take my words for granted... it is just a dim flash in my memory...
If this is indeed the case, then your sound card has a sampling frequency error
when set to 48 kHz,
error which wasn't present at the former rate. But better to ask Joe...
73 Alberto I2PHD
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