See if the settings on this page work - try plughw:0,0 first. https://wiki.gnuradio.org/index.php/Audio_Sink
On Thu, Aug 13, 2020 at 6:57 PM aardric <aard...@aardvarr.ca> wrote: > Hail, > > I am introducing myself to SDR technology and gnuradio through > whatever project documentation I find, dissecting the code and executing > simple experimental flow graphs to test understanding of concepts, > hoping to avoid forum queries (this is my first). Although the audio > sink is not critical to my ultimate use of gnuradio and a bit of a > diversion I will eventually start digging into it. However, I thought to > submit a query on whether there is something obvious I should try in > order to get it working. I am using gnu radio companion 3.8.1.0 (Python > 3.6.10) and feeding the audio sink with a 1 kHz tone from the signal > source block. > > (1) staring with: > :~> aplay -L > null > Discard all samples (playback) or generate zero samples (capture) > default > Default ALSA Output (currently PulseAudio Sound Server) > sysdefault:CARD=PCH > HDA Intel PCH, ALC892 Analog > Default Audio Device > front:CARD=PCH,DEV=0 > HDA Intel PCH, ALC892 Analog > Front speakers > surround21:CARD=PCH,DEV=0 > HDA Intel PCH, ALC892 Analog > 2.1 Surround output to Front and Subwoofer speakers > (...) > hdmi:CARD=PCH,DEV=0 > HDA Intel PCH, HDMI 0 > HDMI Audio Output > hdmi:CARD=PCH,DEV=1 > HDA Intel PCH, HDMI 1 > HDMI Audio Output > hdmi:CARD=PCH,DEV=2 > HDA Intel PCH, HDMI 2 > HDMI Audio Output > hdmi:CARD=PCH,DEV=3 > HDA Intel PCH, HDMI 3 > HDMI Audio Output > hdmi:CARD=PCH,DEV=4 > HDA Intel PCH, HDMI 4 > HDMI Audio Output > > (2) using sysdefault:CARD=PCH for the audio sink device name, > both 44.1 kS/s and 48 kS/s the following runtime error results: > > (3) > gr::log :INFO: audio source - Audio sink arch: oss > audio_oss_sink: sysdefault:CARD=PCH: No such file or directory > Traceback (most recent call last): > File "/gnuradio/examples/audiotest.py", line 136, in <module> > main() > File "/gnuradio/examples/audiotest.py", line 112, in main > tb = top_block_cls() > File "/gnuradio/examples/audiotest.py", line 78, in __init__ > self.audio_sink_0 = audio.sink(samp_rate, 'sysdefault:CARD=PCH', True) > File > "/usr/local/lib64/python3.6/site-packages/gnuradio/audio/audio_swig.py", > line 220, in make > return _audio_swig.sink_make(*args, **kwargs) > RuntimeError: audio_oss_sink > > >>> Done (return code 1) > > (4) Fixing this isn't critical and in time I will get to the bottom of > it; the forum query just removes the possibility of an obvious answer > that most everyone else knows about. My guess is that I have to disable > the Pulse audio server. > > > Rick > > > > >
