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cspctl




SYNOPSIS

       cspctl command [-options] <filename>


DESCRIPTION

       cspctl  is a simple CSP microcode loader for Crative Sound
       Blaster 16ASP and some Sound  Blaster  AWE32  sound  cards
       with   Creative  Signal  Processor  (CSP)  chip  (CT1748A)
       installed.  cspctl can also  be  used  as  a  post-install
       function  to  snd-sb16-csp module to load default codec at
       module installation. If CSP chip is  succesfully  detected
       and initialized, it will be installed as a hardware depen­
       dant device hwC0D2  into  /dev/snd  directory.  Currently,
       following codecs can be loaded to CSP device:

           wfm0001a.csp  QSound decoder
           wfm0006a.csp  A-law codec
           wfm0007a.csp  u-law codec
           wfm0011a.csp  IMA ADPCM codec (distorted output for IMA test files)
           wfm0200a.csp  Creative ADPCM codec (sounds like Intel/DVI IMA ADPCM compatible)
           wfm0202a.csp  Fast Speech 8 codec
           wfm0203a.csp  Fast Speech 10 codec

       These codecs are not yet supported by ALSA:

           wfm0201a.csp  Text2Speech decoder

       Qsound microcode file has four functions, each function is
       a decoder for different  sample  rate.  Rates  for  QSound
       functions  #1,  #2,  #3 and #4 are 44100, 22050, 11025 and
       8000Hz respectively. IMA ADPCM and FastSpeech  codecs  are
       formed  of two functions, the first one is for capture and
       the second one is for playback.  A-law  and  u-law  codecs
       have  only  one function.  To load for example function #2
       from QSound microcode file (decoder for 22050Hz),  run  as
       follows:

           % cspctl load -f 2 -d QSound wfm0001a.csp

       After  successful  loading,  /proc/asound/SB16/cspD2  will
       show:

           Creative Signal Processor [v1.0]
           State: -x--L
           Codec: QSound [func #2]
           Sample rates: 22050Hz
           QSound decoder disabled

       With QSound decoder microcode loaded, all simple PCM  file
           QSound decoder enabled
           Processing 16bit mono PCM samples
           Qsound position: left = 0x9, right = 0x9

       Driver supports autoloading of u-Law, A-Law and  Ima-ADPCM
       hardware  codecs. Autoloading is active only when there is
       no microcode loaded to  CSP,  and  there  is  no  need  to
       preload appropriate *.csp files. To unload manually loaded
       microcode, you should run

           % cspctl unload

       If hardware codec microcode has been manually loaded, then
       CSP  will  support  only loaded PCM format and autoloading
       will be disabled. In such case, proc interface  will  show
       loaded codec properties:

           Creative Signal Processor [v1.0]
           State: -x--L
           Codec: IMA-ADPCM [func #2]
           Sample rates: All
           PCM format ID: 0x400000 (16bit/-) [mono/stereo] [playback/-]


COMMANDS

       load   Load microcode from filename to CSP.

       unload Unload microcode from CSP.


OPTIONS

       -h, --help
              Display a short help.

       -c card
              Select a card number. Option defaults to 0.

       -f function
              Select  a  function  from  microcode  file.  Option
              defaults to 1.

       -d description
              Optional microcode description string.


AUTHOR

       Uros Bizjak <uros@kss-loka.si>.

  




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