gap in sound device numbering

From: Sebastian Seifert (sebastian_at_kontextfrei.de)
Date: 09/29/05

  • Next message: Roman Gaufman: "Re: Sarge - postfix/saslauthd issues" 
    Date: Thu, 29 Sep 2005 16:06:52 +0200
To: debian-user@lists.debian.org

    Hello,

    in my PC there is a single on-board sound card that works great using ALSA and
    OSS emulation where necessary. The sound card is card 0 for alsa.
    I have a bluetooth headset as well. Whenever I attach the bluetooth
    headset, a new ALSA device for it is created, but it gets the device
    number 2. 1 seems to be occupied by some kind of midi device that I
    don't use and which probably is on-board as well.

    For the OSS emulation, /dev/dsp and /dev/dsp2 are created by udev. No
    /dev/dsp1, since the strange midi device does not have any dsp.

    The problem is that I use a VoIP soft phone called "xten xlite" that
    works via OSS and IGNORES /dev/dsp2, because it doesn't find /dev/dsp1
    (and thinks I only have /dev/dsp then). When I symlink /dev/dsp1 to
    /dev/dsp2, I can choose from 3 sound cards. But having to create this
    symlink by hand everytime I want to make a telephone call via my headset
    is tedious.

    What is the best solution for this? Writing a udev rule (can someone
    point me to a primer on how to do that)? Telling alsa to somehow ignore
    the strange midi device? Maybe the number skipping in OSS dsp numbering
    even is a bug (either that or the softphone is buggy)?

    Thanks for any help,
    Sebastian 

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