On 09/22/2016 12:06 PM, Paul Zander wrote: > Problem solved. I used the Sound GUI under the Settingsmenu to select > the audio source. > I am not sure if that is PulseAudio, but the selections and gain > settings do work. > > I even found that I could switch the device while the flowgraph was running. > > That said, I am puzzled about the intended usage of HW:1,0 and and > similar device names. > Suppose I create |~/.asoundrc |following the instructions at: > http://gnuradio.org/redmine/projects/gnuradio/wiki/ALSAPulseAudio > | > | > |Then should I be able to specify the device name in GRC > | > |and not have to rely on the audio setings? > | >
Under Debian, the pulseaudio server is started in the daemon mode on system startup - it takes control of all audio devices. If you're running Ubuntu which is a fork of Debian, it should behave in a manner, i.e., you have to use pulseaudio to use alsa device drivers. I presume the syntax hw:1,0 is for alsa - although I've never seen it displayed by aplay/arecord - but then I've always used pulseaudio. And yes, under Find PulseAudio monitors http://gnuradio.org/redmine/projects/gnuradio/wiki/ALSAPulseAudio should work as long as there is alsa monitor entry for the USB device. I've never tried it. -- Cinaed > > On 09/21/2016 12:40 PM,Cinaed Simson wrote: >> >> On 09/21/2016 09:40 AM, Paul Zander wrote: >>> Cinaed, >>> >>> Your suggestion about testing the audio suggested an new experiment that >>> may be a work-around. >>> >>> With Settings >> Sound >> Input >> Internal Microphone, my GRC with (QT >>> GUI Time Sink) shows a signal that responds to the internal microphone. >>> Speaking or clapping hands causes a response on the graph. >>> >>> When I change the Input to Microphone, USB Audio Device, and re-execute >>> the flowgraph, the signal is very small and does not respond to >>> sounds. Maybe Audio Source only works with the default input from the >>> system. >> >> Use the PulseAudio Volume control to turn up the volume on the input >> device. You can find the find the input device under Inputs. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
