Hi Alberto,
Indeed. Most (USB) soundcards for < 5 EUR can easily handle 48ks/s.
Additionally it would be fine to receive even above 11050 Hz since e.g.
the ALPHA transmitters starts to TX at 11904 Hz. Receiving the Alphas
is a first positive feedback to check if the VLF RX is working at all
:-)
But Jim is right to. If the simplicity would be lost, it would be no
benefit. I am sure you will choose the best things for the new version
:-)
73, ciao, Stefan
Am 10.09.2010 16:28, schrieb Andy Talbot:
Alberto.
These days sampling rates derived from 44100 are poorly
supported. All the modern soundcards are based on 48kHz sampling,
with all values derived from that value. Can I suggest you use this
as your base for Argo 2 rather than 22050.
This explains why 11025 is never achieved now, and always ends
up at 11100. I'm not sure why 8000Hz reqested now is not actually
8kHz, is used to be 8100 presumably because cards back then were 44100
based which can't give 8000 directly, but from 48kHz they should now -
and still don't.
On 10 September 2010 14:30, Alberto di Bene <[email protected]>
wrote:
On 9/10/2010 1:23 PM, [email protected] wrote:
Another 'nicety' would be a 'clear screen' function. Currently one has to stop and restart the
program to clear a previous display ... if for example one has changed receive frequency looking for
a new target or changed mode.
Still enjoy using Argo after all these years!
That is an easy one, and
will be implemented. Also the suggestion of Jim (increase the sampling
rate) was already planned.
Argo will sample at a fixed rate of 22050 Hz, which should be supported
practically by all the sound cards, unlike the previous 5512 Hz,
not universally supported. With 22050 Hz you can directly feed the
output of the antenna preamp to the sound card input,
when performing experiments at 8.9 kHz.
On 9/10/2010 1:42 PM, Mike-WE0H wrote:
It would be very nice if you could modify ARGO so it runs in Linux.
If you mean "natively" under Linux, I am sorry, but there are
technical reasons why this is not possible, the two major ones being
that
the compiler I use (Embarcadero Rad Studio) does not exist under Linux,
and the same can be said for the Intel Signal Processing Library,
also used in Argo.
But I have many reports that Argo, Spectran and Winrad work without
problems with Wine, a Windows emulator under Linux.
On 9/10/2010 12:47 AM, Rick Wakatori wrote:
B.Setup Local time differency from UTC then Argo show UTC all cases.
(1)User can enter a number of time differency from UTC,eg +9. +1.
(2)Argo will calcurate UTC (including date) then display the UTC time
only.
I don't fully understand you Rick. The difference between local time
and UTC time is already managed by Windows,
there is no need for the user to specify it. If the user wants to have
the time displayed in UTC format, he just selects
the relevant option and does not change it anymore. Windows will
perform the calculations needed.
That choice is remembered from one execution to the next, so it needs
to be entered just once.
73 Alberto I2PHD
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