Tascam Digital Interface (TDIF) is an interface for the transmission of eight digital channels, comparable to the ADAT interface, Alesis Digital Audio Tape
(ADAT). The TDIF interface was developed by Tascam and is used in studio
applications.In contrast to ADAT, it works with a 25-pin sub-D connector through which the input and output signals are routed.
The pinout is different for TDIF and the Audio Engineering Society (AES) standardized interface. In the AES version, the inputs and outputs are relatively distributed and separated by ground lines, whereas in the TDIF version, the outputs are routed to pins 1 through 4, and the inputs to pins 10 through 13. The ground pins are located at 7, 14 through 17, and 22 through 25.