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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