D-subminiature connectors are used to carrybalanced analog ordigital audio on many multichannel professional audio equipment, where the use ofXLR connectors is impractical, for example due to space constraints.The most common usage is the DB25, usingTASCAM's pinout (now standardised in AES59 by theAudio Engineering Society[1]). 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 usage is described inAES-2id.[2]
| Pin | Quartz Digital[3] | Bluefish Digital[4] |
|---|---|---|
| 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 + |
| Pin | Yamaha Digital[5] | TASCAM /Digidesign Digital[6] AES59 "Digital combined I/O"[1] | TASCAM Analog[6] AES59 "8-way connections"[1] |
|---|---|---|---|
| 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 |
| 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 + |
| Pin | Signal | Pin | Signal | Pin | Signal |
|---|---|---|---|---|---|
| 1 | Chassis | ||||
| 2 | Ch 1 – | 18 | Ch 1 + | 34 | Ch 1 GND |
| 3 | Ch 2 GND | 19 | Ch 2 – | 35 | Ch 2 + |
| 4 | Ch 3 – | 20 | Ch 3 + | 36 | Ch 3 GND |
| 5 | Ch 4 GND | 21 | Ch 4 – | 37 | Ch 4 + |
| 6 | Ch 5 – | 22 | Ch 5 + | 38 | Ch 5 GND |
| 7 | Ch 6 GND | 23 | Ch 6 – | 39 | Ch 6 + |
| 8 | Ch 7 – | 24 | Ch 7 + | 40 | Ch 7 GND |
| 9 | Ch 8 GND | 25 | Ch 8 – | 41 | Ch 8 + |
| 10 | Ch 9 – | 26 | Ch 9 + | 42 | Ch 9 GND |
| 11 | Ch 10 GND | 27 | Ch 10 – | 43 | Ch 10 + |
| 12 | Ch 11 – | 28 | Ch 11 + | 44 | Ch 11 GND |
| 13 | Ch 12 GND | 29 | Ch 12 – | 45 | Ch 12 + |
| 14 | Ch 13 – | 30 | Ch 13 + | 46 | Ch 13 GND |
| 15 | Ch 14 GND | 31 | Ch 14 – | 47 | Ch 14 + |
| 16 | Ch 15 – | 32 | Ch 15 + | 48 | Ch 15 GND |
| 17 | Ch 16 GND | 33 | Ch 16 – | 49 | Ch 16 + |
| 50 | Chassis |
| Pin | Signal | Pin | Signal | Pin | Signal |
|---|---|---|---|---|---|
| 1 | Ch 1 GND | 18 | Ch 1 – | 34 | Ch 1 + |
| 2 | Ch 2 + | 19 | Ch 2 – | 35 | Ch 2 GND |
| 3 | Ch 3 GND | 20 | Ch 3 – | 36 | Ch 3 + |
| 4 | Ch 4 + | 21 | Ch 4 – | 37 | Ch 4 GND |
| 5 | Ch 5 GND | 22 | Ch 5 – | 38 | Ch 5 + |
| 6 | Ch 6 + | 23 | Ch 6 – | 39 | Ch 6 GND |
| 7 | Ch 7 GND | 24 | Ch 7 – | 40 | Ch 7 + |
| 8 | Ch 8 + | 25 | Ch 8 – | 41 | Ch 8 GND |
| 9 | Ch 9 GND | 26 | Ch 9 – | 42 | Ch 9 + |
| 10 | Ch 10 + | 27 | Ch 10 – | 43 | Ch 10 GND |
| 11 | Ch 11 GND | 28 | Ch 11 – | 44 | Ch 11 + |
| 12 | Ch 12 + | 29 | Ch 12 – | 45 | Ch 12 GND |
| 13 | Ch 13 GND | 30 | Ch 13 – | 46 | Ch 13 + |
| 14 | Ch 14 + | 31 | Ch 14 – | 47 | Ch 14 GND |
| 15 | Ch 15 GND | 32 | Ch 15 – | 48 | Ch 15 + |
| 16 | Ch 16 + | 33 | Ch 16 – | 49 | Ch 16 GND |
| 17 | GND | 50 | GND |