Re: newbie soundmodem question about mic vs line input

From: Tomi Manninen (terhi.victor@logonet.com)
Date: Fri Feb 13 2004 - 20:39:34 EET

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    Hi,

    > 1) Under linux, are the mic and line inputs mixed, or do they
    > have seperate devices to open?

    It's one device, with the input (recording) device selected by
    ioctls.

    > 2) I can play with the mic/line/speaker/etc gains using aumix..
    > Does this have any effect on soundmodem, or does it set the gain
    > using ioctls, etc.

    Soundmodem does not touch the sound card mixer settings nor does
    it change the input selection. These must be set with a regular
    mixer application. I use gmix.

    > 3) The mic jack appears to be mono, where as the line jack appears
    > to be stereo. Does soundmodem have any options to listen to the two
    > channels seperately? i.e. I'd like to do APRS on one channel,
    > and packet on another, but I fear that /dev/dsp is a mix. Is this
    > correct?

    Whether recording is stereo or mono (usually mono == left channel)
    is again selected with ioctls. Soundmodem sets the device for
    mono input and output. 

    -- 
Tomi Manninen / OH2BNS / KP20ME04

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