Hi Onno, Yayy, the mailing list is working again!
Good questions. If you are OK with Linux (and when codec2-dev SVN is alive again), you can use the command line freedv_tx/freedv_rx programs to process a wave file: (build codec-dev as per readme) $ cd build_linux/src $ ./freedv_tx 1600 speech.wav modem_signal.wav $ ./freedv_rx 1600 modem_signal.wav speech_decoded.wav speech.wav should be sampled at 8kHz, 16 bit integer (short) samples, mono. Or send me a wave file you want processed and I'll run it for you. Cheers, David On 23/07/15 09:42, Onno Benschop wrote: > Hi all, > > While Andrew Smith (VK6PDQ/VK6AS) is on holiday I have his SM1000 to > play with. Nice piece of kit. (I added 4 feet to it, makes it stay on > the bench - > http://www.bunnings.com.au/madico-surface-protection-8mm-vinyl-rnd-clr-23260cf_p3979381) > > For an episode* of "What use is an F-call?" - I want to achieve the > following: > > * Record some audio that has been transcoded using CODEC2, so that > listeners get a sense of the difference between analogue and digital > audio. > * Record some digital - non-decoded - audio, so listeners can hear > what CODEC2 sounds like on-air. > * Record some digital - non-decoded - audio and put it as a > "sub-audible" signal underneath some normal analogue audio, so > listeners get two information streams for the price of one. > > I am unclear what audio levels come and go from the SM1000 and I don't > want to blow up either ports on the unit or my computer. > > I have installed FreeDV onto a Debian Wheezy virtual machine. (Running > on a Mac, so no "microphone port", just a "line level port". > > I also have a Heil headset and an audio mixer. > > I've been trolling the documentation, the wiki and other information, > but I'm not clear on how to achieve this electrically. > > Any pointers would be gratefully accepted. (And when I achieve it, I'll > document it, so I won't forget how to do it later ;-) > > I also came across instructions to compile CODEC2 from source, but I > cannot seem to checkout from the repository. Not sure if that is because > of the SF outage > [http://sourceforge.net/blog/sourceforge-infrastructure-and-service-restoration-update-for-722/], > or because of a configuration problem at my end. > > Look forward to hearing from you. > > * Technically, "What use is an F-call?" no longer exists. As of a few > months ago it's now called "Foundations of Amateur Radio", but the > national news is about a year behind, so nationally this won't be heard > for a little while. > -- > Onno Benschop > > ()/)/)() ..ASCII for Onno.. > |>>? ..EBCDIC for Onno.. > --- -. -. --- ..Morse for Onno.. > > If you need to know: "What computer should I buy?" http://goo.gl/spsb66 > > ITmaze - ABN: 56 178 057 063 - ph: 04 1219 8888 - > [email protected] <mailto:[email protected]> > > > ------------------------------------------------------------------------------ > > > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
