On Sunday 22 January 2006 08:29 am, Ben Suffolk wrote: > > > > No, Ben, I don't. And, as I understand it, this is impossible. Since > > > we're just passing through a digital signal to the receiver, it's > > all up to > > > the receiver to deal with it. In order to change the volume, we > > would need > > > to decode the audio, sample down the volume, reencode it, then > > pass it on > > > to the receiver. Maybe it's possible, but it certainly is not very > > > efficient. And, by the way, this is all just speculation. I don't > > really > > > know how it works, but my explanation made sense to me. > > > > And your explanation is more or less correct. If you're passing raw > > digital > > audio, its completely raw, you can't controll its volume level. > > Might be best > > to let Myth do the audio decoding and pass PCM audio instead of raw > > digital > > audio. Could also try to rig up something with an irblaster if > > you're dead > > set on having the amp in a different room and passing raw audio. > > > > -- > > Jarod Wilson > > jarod[at]wilsonet.com > > I though this might be the case, I have to say I don't really know > about digital audio, but I had hoped that maybe it would be quite > easy to manipulate it in the digital realm, so not having to convert > it, just simply dividing each digital value by the volume level. I > guess not. > > I thought maybe I could use an irbalster to swap the inputs on my amp > between regular 2 channel pcm for tv and music, then have it auto > switch to 5.1 when you play a dvd, and then switch back again for TV. > I guess this could be done quite easily with a shell script set as > the player for the dvd & video playback. Not idea, but would allow > the osd for volume in TV etc. > > Ben
Actually there is supposed to be a plugin for this in alsa called "softvol". Check out the bottom of this page: http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html I messed with it for a while but I've been unable to figure out how to make it work.... Paul
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