Creative soundblaster internal AUD_EXT

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40 pin IDC male connector at the soundcard ?

1	VCC	+5V power supply
2	VCC	+5V power supply
3	GND	Ground
4	AC97CLK	24.5 MHz clock output
5	GND	Ground
6	GP_SPDIFIN#2	SPDIF input signal
7	GND	Ground
8	GND	Ground
9	SPDIFO#3	SPDIF Out signal
10	GPO1	General Purpose Output #1
11	GPO2	General Purpose Output #2
12	GND	Ground
13	GPO0	General Purpose Output #0
14	GND	Ground
15	GP_SPDIFIN1	SPDIF Input signal
16	GND	Ground
17	SPDIFO#0	SPDIF Out signal
18	GND	Ground
19	SPDIFO#1	SPDIF Out signal
20	GND	Ground
21	GND	Ground
22	SPDIFO#2	SPDIF Out signal
23	GPI0	Digital Input (GP Input 0; Reserved)
24	GPI1	Digital Input, (GP Input 1; Reserved)
25	OUTMIDI	MIDI Output
26	GND	Ground
27	INMIDI	MIDI Input
28	GND	Ground
29	KEY
30	KEY
31	ADCSDO2	I2S audio data input.
32	GND	Ground
33	ADCSDO1	I2S audio data input.
34	GND	Ground
35	ADCSDO0	I2S audio data input.
36	GND	Ground
37	I2SCLK	I2S serial bit clock.
38	GND	Ground
39	I2SFS	Frame sync.
40	GND	Ground

ADC stands for Analog-to-Digital Converter