Hello Everyone,
Just following up on my 12/24/2012 thread but I just updated the FreeDV
sources but it seems that the most current FreeDV sources still won't
compile on my Linux setup. Any ideas on how to get past the libctb test
for a 64bit Centos6 distro? I'm still getting:
# rpm -ql
Hi David,
Freedv works fine for me with one sound card (rx only), I just tested it
again using the internal sound card of my laptop. Select none for both
sound cards on the tx tab.
It also handles 8kHz 16 bit wave files from the various options on the
Tools menu.
Cheers,
David
On Tue,
Hello David,
Let me try it again and see if I can reproduce what I was doing wrong
and maybe we can add an improved error dialog.
Btw, great to hear that FreeDV can support plain WAV files too.
--David
Freedv works fine for me with one sound card (rx only), I just tested it
again using
David, radios like the softrock have no narrow filters at all, and
they work excellently with SDR. What you know from using CW and SSB
is just wrong for this mode, and for SSTV, and you should not worry
about your filters. Turn them, and your AGC, off. Your FT-950 is just
fine for this mode.
Hello Everyone and Merry Christmas!
Your filters are supposed to be useful for rejecting other signals
when you're using CW or SSB. But it's not clear to me that they
really do much when you're using software defined radio (which of
course this is). SDR can provide software filters that are
On 12/25/2012 12:04 PM, David Ranch wrote:
At least for the FT950, the 3khz roofing filters use block out
adjacent strong signals are understood to be pretty useless:
David, radios like the softrock have no narrow filters at all, and they
work excellently with SDR. What you know from using CW
mailto:cod...@trinnet.net
*To:* freetel-codec2@lists.sourceforge.net
mailto:freetel-codec2@lists.sourceforge.net
*Sent:* Sunday, December 23, 2012 6:19 PM
*Subject:* [Freetel-codec2] Trying to decode captured FDMDV +
Codec2 signal
Hello Everyone,
I'm new to the list
David,
Would you please drop this? Everybody has a right to operate and there's
a sufficient guard channel - one that's almost as wide as the full
bandwidth we use. We run at low power and extremely narrow bandwidth. If
we find that there's an actual operator who is over-driving his radio
Hello David,
Thanks so much for the email response. Please see inline..
Yep that's a freedv.org signal.
This might be a dense question but is there a difference between a
freedv.org signal and the fdmdv+codec2 command line tools? I would
assume there isn't any difference.
It's
David Ranch cod...@trinnet.net writes:
sox /tmp/fldigi-codec2-capture.wav -c 1 -r 8k -t raw -s -2 - |
./fdmdv_demod - - | ./c2dec 1400 - - | aplay -c 1 -r 8000 -t raw -f
S16_LE
You're nearly there -- that will work fine if you frequency-shift the
captured audio up by 300 Hz first, so the
This might be a dense question but is there a difference between a
freedv.org signal and the fdmdv+codec2 command line tools? I would
assume there isn't any difference.
Yes, FreeDV bundles up the fdmdv modem and codec 2.
Ah.. ok, I'll try that out. Thanks! I assume this frequency should
Ranch
To: freetel-codec2@lists.sourceforge.net
Sent: Sunday, December 23, 2012 6:19 PM
Subject: [Freetel-codec2] Trying to decode captured FDMDV + Codec2 signal
Hello Everyone,
I'm new to the list but I've attended a few of Bruce Peren.'s Codec2
presentations at the local Pacificon
Hi David,
We currently have a windows program at FreeDV.org . Linux soon. You can
download that and try to feed audio to it.
Thanks
Bruce
attachment: bruce.vcf--
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