On Sat, 7 May 2011 11:19:31 -0400 David <devurandom@xxxxxxxxxx> wrote: > > This is the same issue that no response was provided for here: > > http://article.gmane.org/gmane.linux.alsa.user/29251/match=digital+sync > > Essentially, I have digital audio going to a receiver in the other room. > Whenever the playing app closes and re-opens the audio device (pianobar, > mplayer) between songs, the digital audio stream looses sync and the first > second or two of audio is not heard. Other side effects seem to be a > hanging "last sample" that throws off the level meters on my Roland M-1000 > digital line mixer after the audio device is closed. > > > I've been using softvol and tried adding dmix, hoping that it would keep the > output alive when no audio is being played, but no luck. When using dmix, I > can prevent the audio device from closing by starting up aplay and leaving > it hanging waiting for input, but this isn't terribly elegant. > > Are there any other ways to achieve this same effect? I don't need to > support multiple formats on the digital output, so doing something that > keeps the hardware layer open is an option too. > > David > > I've been playing recently with acoustic measurements and as the first step i connected the soundcard analog output with its "Line In". My capture session envelopes playback session, i.e. first I start capture and then with a delay playback. The capture session is run in background and it completes after playback. I always see a pulse in capture - even when I playback only zeros. This explain why I hear this pulse in headphones when I start, say, ecasound on per song basis. I'm working with 'hw' devices, so it all supposed to be plain 'alsalib' and drivers. I worked around the problem by further delaying capture - giving enough time for the exponential decay of the the pulse, but it sucks. Regards, Sergei. ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
