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       cspctl - Sound Blaster 16 ASP/CSP control program


       cspctl command [-options] <filename>


       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 successfully detected and initialized, it
       will be installed as a hardware dependent 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 formats can
       be played with QSound 180 degree positioning applied. QSound element is
       dynamically  added  into mixer structure as 3DEffect1-space element. It
       will only show if support for CSP has been compiled into ALSA  drivers,
       CSP  chip  has  been  found,  and QSound codec is loaded into CSP. When
       enabled, QSound position can be dynamically changed  by  mixer  slider,
       and  proc interface should follow the state of CSP chip and its current
       QSound position:

           Creative Signal Processor [v1.0]
           State: Qx-RL
           Codec: QSound [func #2]
           Sample rates: 22050Hz
           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/-]


       load   Load microcode from filename to CSP.

       unload Unload microcode from CSP.


       -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.


       Uros Bizjak <>.

                                April 27, 2000                       cspctl(1)