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| From: | Gary.Simpkins |
| Subject: | Re: [Discuss-gnuradio] Audio source cannot use 2 outputs (Stereo) in windows |
| Date: | Sun, 5 May 2019 13:55:56 +0100 |
| User-agent: | Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 |
Hi Marcus --prefsdir returns Z:gr-buildsrc-stage3staged_installReleaseetcgnuradioconf.d I dont have a drive Z: This confuses simple folk like me. Willing to learn though. Regards Gary On 05/05/2019 11:30, Marcus Müller wrote:
Hi Gary, The "* " is good; when you take that full output of gnuradio-config…, and replace the ";" with line breaks, you get a nice list with indented subentries. In this case, the list entry of interest would be gr-audio * portaudio * windows Nothing to do with windows vs UNIX, it's just the way we output things (for historical reasons). I think it wasn't originally meant to be all on one line (I don't actually know), but you can't change a "diagnostic" program's output to look better later on – there might be someone else's software depending on it being one line (welcome to the hell of popular software!).I saved and restarted the PC, but GNUradio is not using portaudio. So itHuh! Interesting, to say the least. Can you check whether `gnuradio- config-info --prefs` actually shows the correct value (as put by you there)? Best regards, Marcus On Sun, 2019-05-05 at 10:39 +0100, Gary.Simpkins wrote:Hi Marcus and any windows experts Trying to get portaudio working in GNURadio (win10). can you answer these simple questions. Using gnuradio-config-info --enabled-components, I get the following. python-support;testing-support;volk;doxygen;sphinx;gnuradio- runtime;gr-ctrlport;gr-blocks;gnuradio-companion;gr-fec;gr-fft;gr- filter;gr-analog;gr-digital;gr-dtv;gr-atsc;gr-audio;* portaudio;* windows;gr-channels;gr-noaa;gr-pager;gr-qtgui;gr-trellis;gr-uhd;gr- utils;gr-video-sdl;gr-vocoder;gr-fcd;gr-wavelet;gr-wxgui;gr-zeromq. Is the * infront of portaudio significant? Is it a wild card? do you now what this means? (I know this is windows and not UNIX) gnuradio-config-info --userprefsdir responds with C:\Users\Gary\AppData\Roaming\.gnuradio In this directory is a config.conf file. It was empty, so I added [audio] audio_module = portaudio I saved and restarted the PC, but GNUradio is not using portaudio. So it looks like it is not being used. Regards Gary On 04/05/2019 14:39, Müller, Marcus (CEL) wrote:Hey Gary, please keep things on the list! Good news: That's the exact opposite of what I wanted to convey! *Use* GNU Radio's existing portaudio interface; chances are that your GNU Radio installation supports that (which is why I asked how you've installed it). https://www.gnuradio.org/doc/doxygen/page_audio.html tells us how to do that: you just need to find your GNU Radio configuration (for me as Unix user it's in ~/.gnuradio/config.conf, but yours is probably somewhere else; running `gnuradio-config-info --userprefsdir` should give you an idea where to look). Add, if not already in there, the following: [audio] audio_module = portaudio Done! That tells GNU Radio to not just try the first best guess of what audio system you want to use (that being windows API under windows), but to specifically use portaudio – and that should have the features you're looking for. Still, the windows source not working as it should is a pain. We should fix that. Best regards, Marcus On Sat, 2019-05-04 at 08:05 +0100, address@hidden wrote:Many thanks for the explanation. Looks like I can go no further. I do not have the skills to develope the audio source. Gary Sent from my Huawei Mobile -------- Original Message -------- Subject: Re: [Discuss-gnuradio] Audio source cannot use 2 outputs (Stereo) in windows From: "M黮ler, Marcus (CEL)" To: address@hidden,address@hidden CC:Hi Gary!I have double checked and all the windows audio devices I have used for the audio source are 2 channels.I never doubted that – all I wanted to point out that the I think it was Windows that told the GNU Radio windows audio source it saw only one channel, and consequently the windows audio source only enabled one output port. I was wrong, it turns out! When you look at gr- audio/liob/windows/windows_source.cc, you'll find the number of output streams of the block to be hardcoded to be between 1 and 1, so... 1: windows_source::windows_source(int sampling_freq, const std::string device_name) : sync_block("audio_windows_source", io_signature::make(0, 0, 0), io_signature::make(1, 1, sizeof(float))), The last line does that. So, that's a um, underdeveloped feature in the windows audio source.They work fine with WSJT-X, or MAP65. The stereo channels I wish to use are the I and Q outputs frommySDRPLay Duo using virtual cables (I have tried the speaker outputs from the PC with GNURadio audio source and get the same problem) Does the audio source work with two channels on linux?Yes, (haven't tried today, but it /used/ to work), but it sadly shares nearly no code with the windows audio source. That's due to fact that Linux' ALSA and Windows' sound API and OS X's Core Audio are pretty different. I do have an idea, though, which *might* be a solution to your problem, but: untested; don't expect wonders. Has your GNU Radio build portaudio enabled? As said, it's not tested, but unlike the windows audio source, the portaudio source at least from the state of the source code (far as I can tell) enables as many maximum output streams as your card has.I am using the latest version of GNURadio 3.7.13.4 on a 64bit win10PC.Built from source, or where did you happen across it?I am really stuck here. Nothing I try allows the second output tobeenabled.Sorry to hear that! We'll try to get you unstuck :) Best regards, Marcus_______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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