NAME

       smmixer - get/set Linux soundcard packet radio modem driver mixer

SYNOPSIS

       smmixer [-i device] [ params ]

DESCRIPTION

       smmixer  displays  and/or sets the input source and input and output levels of a soundcard
       modem port.

OPTIONS

       smmixer accepts the following option:

       -i     The device argument specifies the soundcard modem device which should be configured
              or interrogated.  It will usually have the following form: sm[0-3].

PARAMETERS

       The AD1848 (WSS) mixer accepts the following parameters:

       ol=val sets  the  level  of  the left output to the specified value. Legal values are from
              -100..0dB.

       or=val sets the level of the right output to the specified value. Legal  values  are  from
              -100..0dB.

       o=val  sets  the  level  of  both  outputs  to  the specified value. Legal values are from
              -100..0dB.

       il=val sets the level of the left input to the specified  value.  Legal  values  are  from
              0..43dB.

       ir=val sets  the  level  of  the right input to the specified value. Legal values are from
              0..43dB.

       i=val  sets the level of both inputs  to  the  specified  value.  Legal  values  are  from
              0..43dB.

       sl=val sets  the  source  of the left input to the specified value. Legal values are line,
              aux1, mic or dac.

       sr=val sets the source of the right input to the specified value. Legal values  are  line,
              aux1, mic or dac.

       s=val  sets the source of both inputs to the specified value. Legal values are line, aux1,
              mic or dac.

       The CT1335 (SB2.x) mixer accepts the following parameter:

       o=val  sets the output level to the specified value. Legal values are from -46..0dB.

       The CT1345 (SBPro) mixer accepts the following parameters:

       ol=val sets the level of the left output to the specified value.  Legal  values  are  from
              -46..0dB.

       or=val sets  the  level  of the right output to the specified value. Legal values are from
              -46..0dB.

       o=val  sets the level of both outputs to  the  specified  value.  Legal  values  are  from
              -46..0dB.

       s=val  sets the input source to the specified value. Legal values are mic, cd or line.

       The CT1745 (SB16, SB32 AWE) mixer accepts the following parameters:

       ol=val sets  the  level  of  the left output to the specified value. Legal values are from
              -62..18dB.

       or=val sets the level of the right output to the specified value. Legal  values  are  from
              -62..18dB.

       o=val  sets  the  level  of  both  outputs  to  the specified value. Legal values are from
              -62..18dB.

       il=val sets the level of the left input to the specified  value.  Legal  values  are  from
              -62..18dB.

       ir=val sets  the  level  of  the right input to the specified value. Legal values are from
              -62..18dB.

       i=val  sets the level of both inputs  to  the  specified  value.  Legal  values  are  from
              -62..18dB.

       s=val  enables  the  specified  value  as a source. Legal values are line, line.l, line.r,
              midi, midi.l, midi.r, cd, cd.l, cd.r or mic.

CONSIDERATIONS

       It is important that the audio levels of your radio match those of the soundcard. To  help
       achieve this, use the smdiag utility.

       This  utility  can only be used after the interface is started up, i.e. after ifconfig sm?
       up.

       The sound driver and the soundcard modem driver are mutually exclusive, i.e.  they  cannot
       both access the same soundcard at the same time. Even worse, the sound driver reserves the
       soundcard as soon as it gets loaded. The souncard modem driver however reserves  the  card
       only when the interface is started, i.e. during ifconfig if up.

       9600  baud  may not currently work on SoundBlaster cards with DSP revision 4.x, i.e.  SB16
       and SB32 AWE. This is because they seem to not be fully backwards compatible.

SEE ALSO

       smdiag (8), sethdlc (8), linux/drivers/net/soundmodem.c

AUTHOR

       smmixer was written by Thomas Sailer (t.sailer@alumni.ethz.ch).