SBSET(1)                 USER COMMANDS                   SBSET(1)



NAME
     sbset - set audio interface parameters

SYNOPSIS
     sbset [-d device_name] [-i input_volume] [-o  output_volume]
     [options]

DESCRIPTION
     sbset sets  various  audio  interface  parameters  including
     input volume, output volume format, compression format, sam-
     pling rate, quantifier bit width, monitor, and input jack.

OPTIONS
     For specifying the compression format:

          -mulaw    specifies mu-law.

          -alaw     specifies A-law.

          -strpcm   specifies straight PCM.

          -adpcm    specifies ADPCM.

     For specifying the number of channels:

          -mono     specifies monaural. -stereo specifies stereo.

     For specifying the number of quantifier bits:

          -4        specifies 4-bit quantization.

          -8        specifies 8-bit quantization.

          -16       specifies 16-bit quantization.

     For specifying the sampling frequency:

          -8000     specifies 8 kHz

          -9450     specifies 9.45 kHz.

          -18900    specifies 18.9 kHz.

          -37800    specifies 37.8 kHz.

     For specifying emphasis (ADPCM only):

          +emphasis specifies to use emphasis.

          -emphasis specifies do not use emphasis.





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SBSET(1)                 USER COMMANDS                   SBSET(1)



          NOTE
          Emphasis is provided to dampen high-level noise in  the
          digital  audio  transfer system, but it rarely needs to
          be specified.  It has been kept to maintain compatibil-
          ity with devices such as CD-ROMs.

     For specifying the mute function:

          +mute     specifies mute.

          -mute     specifies do not mute.

     For specifying the monitor function:

          +monitor  turns the monitor function ON.

          -monitor  turns the monitor function OFF.

     For specifying the input jack:

          -box      specifies   input   with    /dev/sbe0    from
                    microphone/speaker box.

          -line     specifies  input  with  /dev/sbe0  from   the
                    board's line input.

     For specifying the display of settings:

          -v        specifies print settings as standard output.

     Arguments following the -d option are  used  for  specifying
     the  audio interface.  If the sbset command does not include
     the -d option, an attempt is made to open the /dev/sbe0 dev-
     ice.   If it cannot be opened, the /dev/sb0 device file will
     be opened.  The user need not be aware of the  device  being
     used.  However, if both /dev/sb0 and /dev/sbe0 are connected
     to the same machine, or if device names have  been  changed,
     the device name must be specified using the -d option.

     Arguments following the -i option specify the input  volume.
     This  value can be from 0 dB to -32 dB in 0.5 dB increments.
     When line input is used with /dev/sbe0, the range is +7.5 dB
     to -10 dB in 2.5 dB increments.

     Arguments following the -o option specify the output volume.
     This  value can be from 0 dB to -32 dB in 0.5 dB increments.
     The value 0 dB is always used  when  line  output  from  the
     board is used with /dev/sbe0.

SEE ALSO
     sbplay(1), sbrec(1), sound(4).




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