Hi David,
Together with my friend Alfred, HB9EPU, I started today a first trial with
early freedv-windows-2996. Alfred used svn 2978 in his particular Linux/SDR
environment. As the test of mode 700C failed, I easily selected mode 700B
while Alfred had to move over to 700B using now svn 2299. All worked fine as
experienced in the past.
Double check back to 700C: same failure.
Any ideas, why 700C didn't work? Was there any modification of the modem
features?
73, Helmut, DC6NY
-----Ursprüngliche Nachricht-----
Von: David Rowe [mailto:[email protected]]
Gesendet: Donnerstag, 26. Januar 2017 06:45
An: [email protected]
Betreff: [Freetel-codec2] FreeDV 700C early release
Over the past few months I've been working on a new 700C bit/s speech
codec. The idea is to make it roughly the same quality as the FreeDV
1600 mode but at a lower bit rate so it can punch through HF channels
better.
I had a huge response to a recent blog post on the 700C codec:
http://www.rowetel.com/?p=5373
We now have an early version of the FreeDV GUI program for Windows
available, that runs "FreeDV 700C":
http://rowetel.com/downloads/freedv-windows-svn-2996.tar.gz
Richard is also working on a version with a proper installer, but in the
meantime I'd welcome any feedback on 700C/800XA.
I can't guarantee the bit stream will be stable (hence the early release
tag), but I'll let people know if it changes.
As a bonus it also supports the "800XA" mode developed by Brady - which
is the 700C codec with a FSK modem. FSK lets you push a bit more power
through your PA than the normal PSK modem used for FreeDV 700C. It
might also let the smoke out of your SSB PA so pls be careful.
Here are some wave file you can use to test 1600/700C/800XA:
http://rowetel.com/downloads/codec2/ve9qrp_1600.wav
http://rowetel.com/downloads/codec2/ve9qrp_700c.wav
http://rowetel.com/downloads/codec2/ve9qrp_800xa.wav
Play them into FreeDV using the "Tools-Start/Stop Play File from Radio"
option.
Thanks,
David
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