You are not logged in.

#1 2004-09-02 06:01:23

cs25x
Member
Registered: 2004-05-04
Posts: 150

ALSA echo echo echo

This is driving me nuttier.
Once upon a time, my audio system worked, and I think it was after an upgrade.
I am running wombat with a 2.6.7 kernel., but this started before 2.6.7. IIRC, 2.6.4 worked straight off the CD. I am also using udev and I moved to that when I moved to 2.6.7

Now I get echo when I try to setup gnomemeeting, and .asx and .assx streams. So that includes a lot of internet radio and TV streams.

The soundcard is an onboard via8233, so the module is via82cxx, and it is loaded along with all the other  sound driver modules.

It appears to be a common problem with ALSA's oss emulation, from my searching. It is not audio feedback from my mic, and my mic is muted.
here is my /etc/asound.conf

#pcm.snd-via82xx { type hw card 0 }
#ctl.snd-via82xx { type hw card 0 }

#pcm.dsp0 {      type plug      slave.pcm "hw:0,1" }
#pcm.dsp0 {      type plug      slave.pcm "dmix" }
#pcm.dsp {      type hw      card 0 device 1 }
#ctl.dsp {      type hw      card 0 }

pcm.dmixer {
    type dmix
    ipc_key 1021          # must be unique!
    slave {
        pcm "hw:0,0"
        period_time 0
        period_size 1024  # must be power of 2
        buffer_size 4096  # dito. It
        #format "S32_LE"
         #periods 128      # dito.
        rate 48000
    }

# bindings are cool. This says, that only the first
# two channels are to be used by dmix, which is enough for
# (most) oss apps and also lets multichannel chios work
# much faster:

    bindings {
        0 0   # from 0 => to 0
        1 1   # from 1 => to 1
    }
}

# Redirect to dmixer
pcm.!default {
    type plug
    slave.pcm "dmixer"     # use our new PCM here
}# Redirect to dmixer
pcm.!default {
    type plug
    slave.pcm "dmixer"     # use our new PCM here
}

# Redirect to dmixer
pcm.dsp0 {
    type plug
    slave.pcm "dmixer"     # use our new PCM here
}

# mixer0 like above
ctl.mixer0 {
    type hw
    card 0
}

The garbage I have #apped at the top is where I have been playing with things to see what works.

Streams like ram play OK on realplayer, I am using totem for the asx & asxx streams, but the realplayer streams are also OK thru totem. What is interesting is that, e.g. when an announcer is reading news, their face freezes for the duration of the echoes, and then moves as they speak and I hear a couple of words and then get hit by the echo again. The announcers lips move in sync with the echo !!!. ( I wonder how that is done )

Has anybody else got this problem, or had it and solved it ??


--(*(cs25x--));

Offline

#2 2004-09-02 17:24:56

tranquility
Member
From: Portugal
Registered: 2004-08-06
Posts: 136

Re: ALSA echo echo echo

I had a problem with echo using skype and teamspeak and it was the PCM Capture. Try muting it or setting it to zero.

Offline

#3 2004-09-02 22:04:45

cs25x
Member
Registered: 2004-05-04
Posts: 150

Re: ALSA echo echo echo

Everything is locked down excepting for the master stereo and pcm. If I mute either of them, I get silence. Right now capture is on video, and muted.

Echo is still there, complete with lip movement, so it is the entire asx(x) stream that is being repeated.


--(*(cs25x--));

Offline

Board footer

Powered by FluxBB