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).