D-subminiature

D-subminiature

The D-subminiature or D-sub is a common type of electrical connector. They are named for their characteristic D-shaped metal shield. When they were introduced, D-subs were among the smaller connectors used on computer systems....

 connectors are used to carry balanced analog

Balanced audio

Balanced audio is a method of interconnecting audio equipment using impedance-balanced lines. This type of connection is very important in sound recording and production because it allows for the use of long cables while reducing susceptibility to external noise.Balanced connections use...

 or digital

AES/EBU

AES3 is the standard used for the transport of digital audio signals between professional audio devices. It is also known as AES/EBU and is published by the Audio Engineering Society and as part of IEC 60958. It was developed by the AES and the European Broadcasting Union and first published in...

 audio on many multichannel professional audio equipment, where the use of XLR connectors is impractical, for example due to space constraints.
The most common usage is the DB25, using TASCAM

TASCAM

TASCAM is the professional audio division of TEAC Corporation, headquartered in Montebello, California. Tascam is credited as the inventor of the Portastudio, the first cassette-based multi-track home studio recorders. Tascam also introduced the first low-cost mass produced multitrack recorders...

's pinout. To avoid the possibility of bent pins on fixed equipment, the male connector is generally fitted to the cabling and the female connector to the equipment. The DD50 connector is described in AES-2id-1996.

DA15
Pin	Quartz Digital	Bluefish Digital
1	Out 1/2 +	In 5/6 +
2	GND	In 3/4 -
3	Out 3/4 +	In 3/4 +
4	GND	In 1/2 -
5	GND	In 1/2 +
6	Out 5/6 +	In 5/6 -
7	GND	Out 5/6 -
8	Out 7/8 +	In 1/2 GND
9	Out 1/2 -	Out 1/2 GND
10	GND	n/c
11	Out 3/4 -	Out 5/6 +
12	GND	Out 3/4 -
13	Out 5/6 -	Out 3/4 +
14	GND	Out 1/2 -
15	Out 7/8 -	Out 1/2 +

DB25
Pin	Yamaha Yamaha Pro Audio Yamaha Pro Audio, Inc. is a company that offers a complete line of professional audio products for the live sound and sound reinforcement markets... Digital	TASCAM TASCAM TASCAM is the professional audio division of TEAC Corporation, headquartered in Montebello, California. Tascam is credited as the inventor of the Portastudio, the first cassette-based multi-track home studio recorders. Tascam also introduced the first low-cost mass produced multitrack recorders...  / Digidesign Digidesign Avid Audio is an American digital audio technology company. It was founded in 1984 by Peter Gotcher and Evan Brooks. The company began as a project to raise money for the founders' band, selling EPROM chips for drum machines. It is a subsidiary of Avid Technology, and during 2010 the Digidesign... Digital	TASCAM TASCAM TASCAM is the professional audio division of TEAC Corporation, headquartered in Montebello, California. Tascam is credited as the inventor of the Portastudio, the first cassette-based multi-track home studio recorders. Tascam also introduced the first low-cost mass produced multitrack recorders... Analog
1	In 1/2 +	Out 7/8 +	In/Out 8 +
2	In 3/4 +	Out 7/8 GND	In/Out 8 GND
3	In 5/6 +	Out 5/6 -	In/Out 7 -
4	In 7/8 +	Out 3/4 +	In/Out 6 +
5	Out 1/2 +	Out 3/4 GND	In/Out 6 GND
6	Out 3/4 +	Out 1/2 -	In/Out 5 -
7	Out 5/6 +	In 7/8 +	In/Out 4 +
8	Out 7/8 +	In 7/8 GND	In/Out 4 GND
9	n/c	In 5/6 -	In/Out 3 -
10	GND	In 3/4 +	In/Out 2 +
11	n/c	In 3/4 GND	In/Out 2 GND
12	GND	In 1/2 -	In/Out 1 -
13	GND	n/c	n/c
14	In 1/2 -	Out 7/8 -	In/Out 8 -
15	In 3/4 -	Out 5/6 +	In/Out 7 +
16	In 5/6 -	Out 5/6 GND	In/Out 7 GND
17	In 7/8 -	Out 3/4 -	In/Out 6 -
18	Out 1/2 -	Out 1/2 +	In/Out 5 +
19	Out 3/4 -	Out 1/2 GND	In/Out 5 GND
20	Out 5/6 -	In 7/8 -	In/Out 4 -
21	Out 7/8 -	In 5/6 +	In/Out 3 +
22	GND	In 5/6 GND	In/Out 3 GND
23	GND	In 3/4 -	In/Out 2 -
24	GND	In 1/2 +	In/Out 1 +
25	GND	In 1/2 GND	In/Out 1 GND

Lynx AES16(e) Digital I/O Pinout using HD26
Pin	Signal	Pin	Signal	Pin	Signal
1	Clock Gnd	10	Clock
2	Out Ch 8 -	11	Out Ch 8 +	19	Out Ch 8 GND
3	Out Ch 7 GND	12	Out Ch 7 -	20	Out Ch 7 +
4	Out Ch 6 -	13	Out Ch 6 +	21	Out Ch 6 GND
5	Out Ch 5 GND	14	Out Ch 5 -	22	Out Ch 5 +
6	In Ch 4 -	15	In Ch 4 +	23	In Ch 4 GND
7	In Ch 3 GND	16	In Ch 3 -	24	In Ch 3 +
8	In Ch 2 -	17	In Ch 2 +	25	In Ch 2 GND
9	In Ch 1 GND	18	In Ch 1 -	26	In Ch 1 +

DD50
Pin	Quartz / AES-2id Digital
1	Ch 1 GND
2	Ch 2 +
3	Ch 3 GND
4	Ch 4 +
5	Ch 5 GND
6	Ch 6 +
7	Ch 7 GND
8	Ch 8 +
9	Ch 9 GND
10	Ch 10 +
11	Ch 11 GND
12	Ch 12 +
13	Ch 13 GND
14	Ch 14 +
15	Ch 15 GND
16	Ch 16 +
17	GND
18	Ch 1 -
19	Ch 2 -
20	Ch 3 -
21	Ch 4 -
22	Ch 5 -
23	Ch 6 -
24	Ch 7 -
25	Ch 8 -
26	Ch 9 -
27	Ch 10 -
28	Ch 11 -
29	Ch 12 -
30	Ch 13 -
31	Ch 14 -
32	Ch 15 -
33	Ch 16 -
34	Ch 1 +
35	Ch 2 GND
36	Ch 3 +
37	Ch 4 GND
38	Ch 5 +
39	Ch 6 GND
40	Ch 7 +
41	Ch 8 GND
42	Ch 9 +
43	Ch 10 GND
44	Ch 11 +
45	Ch 12 GND
46	Ch 13 +
47	Ch 14 GND
48	Ch 15 +
49	Ch 16 GND
50	GND