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 Creative Sound Blaster
15 16ASP and some Sound Blaster AWE32 sound cards with Creative Signal
16 Processor (CSP) chip (CT1748A) installed. cspctl can also be used as a
17 post-install function to snd-sb16-csp module to load default codec at
18 module installation. If CSP chip is successfully detected and initial‐
19 ized, it will be installed as a hardware dependent device hwC0D2 into
20 /dev/snd directory. Currently, following codecs can be loaded to CSP
21 device:
22 wfm0001a.csp QSound decoder
25 wfm0006a.csp A-law codec
26 wfm0007a.csp u-law codec
27 wfm0011a.csp IMA ADPCM codec (distorted output for IMA test files)
28 wfm0200a.csp Creative ADPCM codec (sounds like Intel/DVI IMA ADPCM compatible)
29 wfm0202a.csp Fast Speech 8 codec
30 wfm0203a.csp Fast Speech 10 codec
31 These codecs are not yet supported by ALSA:
33 wfm0201a.csp Text2Speech decoder
35 Qsound microcode file has four functions, each function is a decoder
37 for different sample rate. Rates for QSound functions #1, #2, #3 and #4
38 are 44100, 22050, 11025 and 8000Hz respectively. IMA ADPCM and Fast‐
39 Speech codecs are formed of two functions, the first one is for capture
40 and the second one is for playback. A-law and u-law codecs have only
41 one function. To load for example function #2 from QSound microcode
42 file (decoder for 22050Hz), run as follows:
43 % cspctl load -f 2 -d QSound wfm0001a.csp
45 After successful loading, /proc/asound/SB16/cspD2 will show:
47 Creative Signal Processor [v1.0]
50 State: -x--L
51 Codec: QSound [func #2]
52 Sample rates: 22050Hz
53 QSound decoder disabled
54 With QSound decoder microcode loaded, all simple PCM file formats can
56 be played with QSound 180 degree positioning applied. QSound element is
57 dynamically added into mixer structure as 3DEffect1-space element. It
58 will only show if support for CSP has been compiled into ALSA drivers,
59 CSP chip has been found, and QSound codec is loaded into CSP. When
60 enabled, QSound position can be dynamically changed by mixer slider,
61 and proc interface should follow the state of CSP chip and its current
62 QSound position:
63 Creative Signal Processor [v1.0]
66 State: Qx-RL
67 Codec: QSound [func #2]
68 Sample rates: 22050Hz
69 QSound decoder enabled
70 Processing 16bit mono PCM samples
71 Qsound position: left = 0x9, right = 0x9
72 Driver supports autoloading of u-Law, A-Law and Ima-ADPCM hardware
74 codecs. Autoloading is active only when there is no microcode loaded to
75 CSP, and there is no need to preload appropriate *.csp files. To unload
76 manually loaded microcode, you should run
77 % cspctl unload
79 If hardware codec microcode has been manually loaded, then CSP will
81 support only loaded PCM format and autoloading will be disabled. In
82 such case, proc interface will show loaded codec properties:
83 Creative Signal Processor [v1.0]
86 State: -x--L
87 Codec: IMA-ADPCM [func #2]
88 Sample rates: All
89 PCM format ID: 0x400000 (16bit/-) [mono/stereo] [playback/-]
90
92 load Load microcode from filename to CSP.
93 unload Unload microcode from CSP.
95
97 -h, --help
98 Display a short help.
99 -c card
101 Select a card number. Option defaults to 0.
102 -f function
104 Select a function from microcode file. Option defaults to 1.
105 -d description
107 Optional microcode description string.
108
111 Uros Bizjak <uros@kss-loka.si>.
112 April 27, 2000 cspctl(1)