On Tue, 2011-09-27 at 00:05 +0530, Sriram Gopalan wrote: > Hello everybody, > We are facing an issue with loopback in pulse audio 0.9.22. We > recently ported pulseaudio to an ARM 11 based evaluation board and are > running pulseaudio in system mode. The application being targeted is > In-vehicle-Infotainment and the board has a Mono Mic ( 16-bit, 1 > channel) and a Stereo Speaker ( 2 channels, 16-bit, 44.1 Khz). > > > 1) With gstreamer we are able to playback audio to the speakers using > the following command. pulseaudio promptly gets into action and plays > the file at 44.1 Khz without a glitch - > #gst-launch filesrc location=/home/test/songs/test.mp3 ! mad ! > alsasink > > > 2) When we do a capture with the mic using the command below, again it > works fine ( By default arecord and aplay use 8Khz, 8-bit mono channel > for capture and playback) - > #arecord test.wav > #aplay test.wav > > > 3) However, when we attempt the followings, it does not work. We > cannot hear any audio, whereas the same works on my Ubuntu 10.10 > desktop > #arecord | aplay > #gst-launch alsasrc ! alsasink > #pactl load-module module-loopback Incidentally, why are all the tests with alsasrc/alsasink and not pulsesrc/pulsesink? -- Arun
