Greetings! I just found this mailing list today...
Since it was unusually warm today, I brought the coax inside through an open window. My HF wire dipole antenna is not in good shape. However, I got it situated so that now at least some signals get to the radio. Even with the tuner I have trouble on 20 meters. Is there a freedv watering-hole on another HF band? Around local sunset (22:xx UTC Sunday 13 Jan 2013) I actually decoded some partial syllables and callsign of Gerry, N4DVR's signal on 14.236. I can see some FDMDV patterns in the waterfall, but with low SNR due to my poor antenna cannot decode most of the time. So far I just have my Yaesu 817 wired up to the computer - so that limits my power out too. ===== Linux debuggers: ====== I was at my wits end running freedv on Debian Wheezy with a gnome3 desktop until I stumbled upon running pasuspender. $ pasuspender ./freedv Like most people, I know little of the interactions between portaudio applications and the use of pulseaudio promoted by the freedesktop.org people. It might help if freedv could get some useful error messages and perhaps the smarts to just do the right thing. Without pasuspender, the freedv error popup said "Counldn't initialise sound device" for my radio interface - a DMK enigineering URI USB sound fob. And the console output mentioned something about: Expression 'parameters->channelCount <= maxChans' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 1438 ===== Backporters, .deb packages: ====== Bruce: Now that I've looked through the archives of this list, I see we've been covering some of the same ground. We should talk... ===== Optimizers... ====== Nice to see people looking into options of FFT libraries. Cool things have been going on in GnuRadio - and I hope people are aware of VOLK: vector optimized library of kernels. It's an abstraction that allows signal processing code to work at a higher level, and then use CPU optimizations like SIMD instructions (SSE, NEON, Altivec etc.) to go fast. ====== My TODO list ====== Looks like good things have been happening - I need to read through the list archives. But first, let me list a few topics that I'm hoping to look into, and ask for comments from others who might have similar interests... - Add USB HID PTT Some USB radio interfaces use USB sound cards that also have USB HID controlled GPIO lines... For example the DMK Engineering URI as used by asterisk app_rpt. The Linux soundmodem has support for this PTT technique. - Look into Cmake build for freedv Gnu Radio went to Cmake, and it has a lot of support among projects that want to work under Linux, Windows and OS X. Automake is a big pain, and so is Cmake. Perhaps we should try both, then decide. - Quisk integration with FDMDV As a way to listen to freedv signals with FPGA based radios (HiQsdr, Charleston), networked receivers from rfspace (sdriq, sdrip), and various softrock flavors. - Gnu Radio integration with FDMDV There should be a block in Gnu Radio for FDMDV signals. (Caution - there may be ancient codec2 bits wandering around in Gnu Radio. I hope to help improve that situation too.) Then gqrx can more easily use FDMDV. - My antenna And, of course, I need to make an antenna that works better on 14.236. - Dayton Bruce: I expect I could spend some time helping you with a codec2/freedv spot at Dayton. 73 de aa4hs, -Maitland ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. SALE $99.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122412 _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
