Re: ALSA / DMIX
Hey there,
El Sáb 10 Jul 2004 04:08, B. Douglas Hilton escribió:
> First, why use xmms when Alsaplayer is so cool? Its really good IMHO.
> Alsa is great, especially if you are a musician or work with midi or
> such. Nothing beats it.
I tried, the sound works like a charm...but I'll keep using xmms (some
special features).
> For mplayer, hmm... mine works and is self compiled, make sure you
> have your kernel source compiled and supposedly it will detect alsa
> headers and such. Even if if has to use oss fallback that should
> still work ok.
Mine is working with alsa, my .mplayer/config(I have sarges alsa-headers
installed):
ao=alsa:default
> It took me some tinkering around to get alsa working on my system but
> it is definately superior to anything else around. If it even works
> at all then thats a real good sign.
I'm not saying that alsa doesn't works well. I think that alsa ROCKS!!!,
but DMix support is not working as expected. For example: Depending on
the sound card your /etc/asound.conf YMMV.
> Tip: try killing esd if its running, there's some bug with it that it
> grabs /dev/dsp and locks it so it really screws up alsa apps.
I'm using Arts, no esd arround. Arts works nice through dmixed alsa, but
some apps won't work well, JUK.
> Tip2: compile your kernel with static sound, (no modules), debian
> alsa will grumble a bit about no modules found but it all should
> work. A static kernel sometimes isn't a bad idea for a laptop since
> your hardware is known and immutable. I usually build all static
> support for laptop internal devices and modules for pluggable things
> like USB, serial, parallel, etc.
I now discover is loading the alsa modules, but I'll try it out.
Guess what, I found out what was the problem with xmms, it only happens
with mp3 files, so I installed the mad plugin and it is working like a
charm.
Thanx for your time.
> - Doug
>
> Nicolás Velásquez O. wrote:
> >Hello there,
> >
> >My system:
> >- Dell, Inspiron 5100
> >- Debian sarge
> >- snd_intel8x0
> >- Self compiled kernel 2.6.7
> >
> >I've had not so nice experiences (neither dmix nor asym) with it:
> >- Using xmms, if there is a lot of disk usage, audio will stop
> > playing. - Using (self compiled) mplayer, the audio won't play
> > well.
> >
> >Solutions: (better solutions are welcome!!!!!!)
> >- xmms, use xmms through arts (and arts through alsa)
> >- MPlayer, give cache to the default alsa device.
> >
> >Solutions drawbacks:
> >- xmms, arts ain't that good, some audio files will play lossy.
> >- MPlayer, none.
> >
> >Links:
> >http://alsa.opensrc.org/index.php?page=DmixPlugin
> >http://alsa.opensrc.org/index.php?page=asym
> >
> >
> >
> >My /etc/asound.conf:
> >#asym fun start here. we define one pcm device called "dmixed"
> >pcm.dmixed {
> > type dmix
> > ipc_key 1025
> > slave {
> > pcm "hw:0,0" # you cannot use a "plug" device
> > #here,darn.
> > period_time 0
> > period_size 1024 # must be power of 2
> > buffer_size 8192 # dito. It
> > #format "S32_LE"
> > #periods 128 # dito.
> > #rate 8000 # with rate 8000 you *will* hear,
> > # if ossmix is used :)
> > }
> > bindings {
> > 0 0
> > 1 1
> > }
> >}
> >
> >#one called "dsnooped" for capturing
> >pcm.dsnooped {
> > ipc_key 1027
> > type dsnoop
> > slave.pcm "hw:0,0"
> >}
> >
> >#and this is the real magic
> >pcm.asymed {
> > type asym
> > playback.pcm "dmixed"
> > capture.pcm "dsnooped"
> >}
> >
> >#a quick plug plugin for above device to do the converting magic
> >pcm.pasymed {
> > type plug
> > slave.pcm "asymed"
> >}
> >
> >#a ctl device to keep xmms happy
> >ctl.pasymed {
> > type hw
> > card 0
> >}
> >
> >#for aoss:
> >pcm.dsp0 {
> > type plug
> > slave.pcm "asymed"
> >}
> >
> >ctl.mixer0 {
> > type hw
> > card 0
> >}
> >
> ># alsa default card
> >pcm.!default {
> > type plug
> > slave.pcm "asymed"
> >}
> >#done
> >
> >El Vie 09 Jul 2004 18:37, Chris Metcalf escribió:
> >>Has anybody had a good experience getting the Dmix plugin working
> >>well with ALSA?
> >>
> >>I'm trying to get my laptop (Thinkpad X31 using the snd_intel8x0
> >> ALSA module) to be able to play more than one wave channel at
> >> once, but I'm not having much success.
> >>
> >>Any helpful direction (howtos, good/bad experiences, alternate
> >>methods) would be appreciated.
> >>
> >>Thanks,
> >>--
> >>Chris Metcalf
> >>chris@chrismetcalf.net
> >>http://chrismetcalf.net
--
Atentamente,
Nicolás Velásquez
Bogotá, Colombia
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