1cspctl(1) General Commands Manual cspctl(1)
2
6 cspctl - Sound Blaster 16 ASP/CSP control program
7
10 cspctl command [-options] <filename>
11
14 cspctl is a simple CSP microcode loader for Crative Sound Blaster 16ASP
15 and some Sound Blaster AWE32 sound cards with Creative Signal Processor
16 (CSP) chip (CT1748A) installed. cspctl can also be used as a post-
17 install function to snd-sb16-csp module to load default codec at module
18 installation. If CSP chip is succesfully detected and initialized, it
19 will be installed as a hardware dependant device hwC0D2 into /dev/snd
20 directory. Currently, following codecs can be loaded to CSP device:
21 wfm0001a.csp QSound decoder
24 wfm0006a.csp A-law codec
25 wfm0007a.csp u-law codec
26 wfm0011a.csp IMA ADPCM codec (distorted output for IMA test files)
27 wfm0200a.csp Creative ADPCM codec (sounds like Intel/DVI IMA ADPCM compatible)
28 wfm0202a.csp Fast Speech 8 codec
29 wfm0203a.csp Fast Speech 10 codec
30 These codecs are not yet supported by ALSA:
32 wfm0201a.csp Text2Speech decoder
34 Qsound microcode file has four functions, each function is a decoder
36 for different sample rate. Rates for QSound functions #1, #2, #3 and #4
37 are 44100, 22050, 11025 and 8000Hz respectively. IMA ADPCM and Fast‐
38 Speech codecs are formed of two functions, the first one is for capture
39 and the second one is for playback. A-law and u-law codecs have only
40 one function. To load for example function #2 from QSound microcode
41 file (decoder for 22050Hz), run as follows:
42 % cspctl load -f 2 -d QSound wfm0001a.csp
44 After successful loading, /proc/asound/SB16/cspD2 will show:
46 Creative Signal Processor [v1.0]
49 State: -x--L
50 Codec: QSound [func #2]
51 Sample rates: 22050Hz
52 QSound decoder disabled
53 With QSound decoder microcode loaded, all simple PCM file formats can
55 be played with QSound 180 degree positioning applied. QSound element is
56 dynamically added into mixer structure as 3DEffect1-space element. It
57 will only show if support for CSP has been compiled into ALSA drivers,
58 CSP chip has been found, and QSound codec is loaded into CSP. When
59 enabled, QSound position can be dynamically changed by mixer slider,
60 and proc interface should follow the state of CSP chip and its current
61 QSound position:
62 Creative Signal Processor [v1.0]
65 State: Qx-RL
66 Codec: QSound [func #2]
67 Sample rates: 22050Hz
68 QSound decoder enabled
69 Processing 16bit mono PCM samples
70 Qsound position: left = 0x9, right = 0x9
71 Driver supports autoloading of u-Law, A-Law and Ima-ADPCM hardware
73 codecs. Autoloading is active only when there is no microcode loaded to
74 CSP, and there is no need to preload appropriate *.csp files. To unload
75 manually loaded microcode, you should run
76 % cspctl unload
78 If hardware codec microcode has been manually loaded, then CSP will
80 support only loaded PCM format and autoloading will be disabled. In
81 such case, proc interface will show loaded codec properties:
82 Creative Signal Processor [v1.0]
85 State: -x--L
86 Codec: IMA-ADPCM [func #2]
87 Sample rates: All
88 PCM format ID: 0x400000 (16bit/-) [mono/stereo] [playback/-]
89
91 load Load microcode from filename to CSP.
92 unload Unload microcode from CSP.
94
96 -h, --help
97 Display a short help.
98 -c card
100 Select a card number. Option defaults to 0.
101 -f function
103 Select a function from microcode file. Option defaults to 1.
104 -d description
106 Optional microcode description string.
107
110 Uros Bizjak <uros@kss-loka.si>.
111 April 27, 2000 cspctl(1)