On Tue, 2006-05-09 at 01:41 +0200, Christoph Anton Mitterer wrote: > Lee Revell wrote: > > Try ALSA 1.0.11, many bugs have been fixed since 1.0.11-rc2 > Ok,.. is it going to be part of 2.6.17? > > >> First of all does this chip support hardware mixing and full duplex? > > Hardware mixing no, full duplex yes > What is the benefit of hardware mixing at all?
1. It Just Works 2. Less CPU usage > Of course I understand that you > can play several streams at the same time (without using a sound daemon like > esd/arts/etc). > But is hardware mixing much better than software mixing (I think one must use > dmix for software mixing)? > > This is also an important question for me to decide which soundcard I should > buy. > In an additional post to this list I told that I'd prefer the TerraTec Aureon > 7.1 Universe. But this one porbably doesn't support true hardware mixing and > true full duplex (does it?). > So if I buy an expensive soundcard like this (it costs about € 150,00) should > the card have the hardware mixing feature? > I don't think any new cards support it. The trend is to do all mixing in software these days - CPUs are fast and it makes the hardware cheaper. > > > What my card should be able to do is (of course with all additional features > like 7.1 sound and so on)... > - esound (or any other sound daemon) should be able to access the card so that > GNOME applications that use esd can play sounds or record audio > - but in each case it should be possible for other processes to access the > ALSA > devices too (both playing and recording); like mplayer,.. or gstreamer > applications if I set up gst to use ALSA). > - and I want Ekiga (gnomemeeting, or any other VoIP software to be able to > open > conferences (multiple conferences too, although I think Ekiga itself does not > support this yet) - which means Ekiga must be able to play and record audio > (via > ALSA but not ESD) - AND !! while doing this (communication via VoIP) I still > want to hear my other system sounds (those from GNOME via esd or other ALSA > using applications. > > Ok,.. so of course full duplex is required for all the above (otherwise I > would > not be able to record and hear simultaneously). > But is hardware mixing required for this? If so,.. can all this achieved > (without any drawbacks to the hardware mixing way !!!) via software mixing? Hardware mixing makes it much easier but it should work with software mixing (dmix) > I've already did some poor tests with software mixing (as I told before I'm > not > an ALSA expert ;) )... but the sound came always very disturbed or with a big > lag. > Try latest versions. You do not need to set up an .asoundrc, dmix will be enabled by default > > Are there applications that can excusively lock the ALSA devices (for playing > and/or recording) even when hardware and/or software mixing is set up? (I ask > because I wonder wheter applications like Ekiga do this) > Yes, an app that uses OSS and is not run with the aoss wrapper will block the soundcard. > > > What's your libasound2 version? Dmix should be enabled automatically > > for this chipset. If you're using ESD make sure it is running in ALSA > > mode not OSS. > libasound2: 1.0.11-3 > > I'm very sure that ESD runs in ALSA mode, because I don't have activated any > OSS > stuff in the kernel (not even the wrappers), and I've installed the Debian > package libesd-alsa0. > OK that should not block the soundcard (try lsof /dev/dsp or fuser /dev/dsp to be sure), or don't load the snd-pcm-oss module, and you won't get a /dev/dsp at all. > > >> 2nd Problem: The Mixer does not work correctly. When I change the settings > >> for > >> Master (e.g. via gnome-volume-control or alsamixer) nothing happens at > >> all. But > >> when I vary the value for Headphones it behaves as if Headphones would be > >> the > >> Master. > >> Is there any way to correct this?. > > Try the latest ALSA release and if it's still broken file a bug report. > Ok,.. I'll do that,.. but please not that this problem exists since last > october > (when I assembled the computer). I've just been to lazy to take care on it > until > now ;) > > Regards, > Chris. > > > > ------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > _______________________________________________ > Alsa-user mailing list > Alsa-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-user > ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
