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Why can't I access hw:1,0 until gstreamer-properties is run once?

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linux-howto

http://askubuntu.com – Not necessarily an Ubuntu-specific question but I wasn't sure where else to ask. I have an AverMedia DVD EZMaker 7 which plugs into USB and works well on Ubuntu 12.04. I downloaded and installed the official drivers without error. However, when I try: gst-launch alsasrc device="hw:1,0" ! alsasink device="hw:0,0" it tells me: Setting pipeline to PAUSED ... Pipeline is live and does not need PREROLL ... Setting pipeline to PLAYING ... New clock: GstAudioSrcClock ...which is the normal output, however there is no audible sound. Trying the command again doesn't help. If I run gstreamer-prope (HowTos)