cspctl(1)						      General Commands Manual							 cspctl(1)

NAME

       cspctl - Sound Blaster 16 ASP/CSP control program

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 Pro-
       cessor (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 cap-
       ture 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/-]

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>.

								  April 27, 2000							 cspctl(1)