skype and alsa dmix

Hetfield666 · Tux's lil' helper Joined: 28 Feb 2004 Posts: 99

i have dmix alsa plugin and i use it with success with xmms and mplayer and other programs.

the problem is with skype, that uses oss libs.

i tried to start with aoss (aoss works with many apps here)

and i get segmentation faults. without aoss i can use skype, but without mixing.

i tried several skype versions, static and not, same issue for everyone.

Anyone solved that?

aoss skype
No running artsd or esd found
Starting skype without sound daemon
==========================================
/usr/bin/skype: line 50: 17970 Segmentation fault ${skypecmd} ${progopts} >>${logfile} 2>>${logfile}

irondog · Posted: Sat Jul 02, 2005 1:20 pm Post subject:

It both sucks that:
* Alsa can't do software mixing for /dev/dsp (why??)
* Skype still uses OSS (/dev/dsp) instead of alsa.

So, same problem here.
_________________
Alle dingen moeten onzin zijn.

Hetfield666 · Tux's lil' helper Joined: 28 Feb 2004 Posts: 99

skype uses oss, but with aoss you can have dmix working.

there was a bug in aoss making skype crashing, fixed in alsa cvs now.

but sound is not working, and it's a alsa and skype cross bug.

i've filled some bug request, waiting for fix.

gimpel · Posted: Tue Jul 05, 2005 9:14 am Post subject:

x.para · Apprentice Joined: 22 May 2005 Posts: 174 Location: CZ

I had similar problem and I resolved it to disable KDE sound, emerging new alsa-driver, alsa-oss, alsa-lib and alsa-utils. Than it started to work fine with my Skype.

KarlfstBorst · Posted: Wed Jul 06, 2005 12:07 pm Post subject:

Hi! I use Skype with aoss, dmix, snoop and Gnome Soundserver without problems.

My setup:
*M-Audio Audiophile 2496
*Intel Soundcard onboard
*Skype 1.0.0.20
*ALSA 1.0.8
.asoundrc:
------------------
pcm.audiophile {
type hw
card 0
}

pcm.intel {
type hw
card 1
}

# ICE1712 dmix:
pcm.ossmix {
type dmix
ipc_key 1024
slave {
pcm "hw:0,0"
period_time 0
period_size 1024
buffer_size 4096 # buffer size < 6653, but pow(x, 2)
rate 44100 # we want to play CDs only
}

bindings {
0 0
1 1
}
}

#######################################
# Allow reading from the default device.
# Also known as record or capture.
pcm.dsnoop {
type dsnoop
ipc_key 2048
slave.pcm "intel"

bindings {
0 0
1 1
}
}

# This is what we want as our default device
# a fully duplex (read/write) audio device.
pcm.duplex {
type asym
playback.pcm "ossmix"
capture.pcm "dsnoop"
}
#######################################

# Everything shall be dmixed, so redefine "default":
pcm.!default {
type plug
#slave.pcm "ossmix"
slave.pcm "duplex"
}

# OSS via aoss should d(mix)stroyed:
pcm.dsp0 {
type plug
#slave.pcm "ossmix"
slave.pcm "duplex"
}

# OSS control for dsp0 (needed?...this might not be useful)
#ctl.dsp0 {
# type plug
# slave.pcm "audiophile"
# #slave.pcm "duplex"
#}

# OSS control for dsp0 (needed?...this might not be useful)
#ctl.dsp1 {
# type plug
# slave.pcm "intel"
#}

ctl.mixer0 {
type hw
card 0
}

#ctl.mixer1 {
# type hw
# card 1
#}
---------------------

Best regards

André.

gimpel · Posted: Wed Jul 06, 2005 12:59 pm Post subject:

@ KarlfstBorst

boah! you managed to route the mic in of your onboard card with dsnoop? awesome! must test that too!
i'm currently using line in and mic is connected to my dj mixer, which i use as mic preamp that way

delta audiophile 2496 too

EDIT: humm, using your asoundrc i can't open any device at all:
EDIT2: ah, got it! awesome! udev didn't create mixer0.. but only mixer

thx!
_________________
http://proaudio.tuxfamily.org/wiki - pro-audio software overlay

irondog · Posted: Fri Jul 08, 2005 2:55 pm Post subject:

cast0r · Tux's lil' helper Joined: 15 Dec 2004 Posts: 89

which package owns aoss, dmix, and snoop?

Poseidon

Just emerge package 'alsa-oss'.

phadron · Posted: Tue Aug 23, 2005 9:30 pm Post subject: