I've collected several postings to the DAT-Heads mailing list concerning the Sony TCD-D7 7-pin connector and put together some "do it yourself" projects providing digital I/O for the D7. The TCD-D3 and TCD-D8 have the same 7-pin connector as the TCD-D7, so the info here applies to them also ...
I've heard that the S/P-DIF transmitter/receiver circuits described above can be used to add digital I/O to an "Epoch SoundPro HT-1869V+ Card" ... but please don't ask me about this. Some information about this "hack" might be available here or there.
Here is some basic information about the SCMS copy protection scheme.
Some SCMS copy processor projects:
Some information about measuring DAT error rates:
Another project adding an "error rate output" to the Sony 55ES / 57ES will be available here at some time in the future. It uses a GAL 16V8 connected to the DAT's internal CN333 connector and requires an external "universal counter"
If you are interested in a "do it yourself" remote control for a Sony TCD-D7 or always wanted to know how "SIRCS" (serial infrared remote control system) works, you should have a look at the following program:
SIRCS message files for sircs4.exe:
Some other external contributions:
I've added two further SIRCS messages to tcdd7.sny on 14-mar-96. Thanks to Steven K. Roberts.
Thanks to Ulrich Hornstein for his opto coupler circuit and for "promoting" SIRCS on DAT-Heads.
Guy Lambert has also added support for 15 and 20 bit SIRCS messages to sircs4. Further information about his new version sircsall and some further SIRCS messages he collected are available on his SIRCS page.
Use your HP 48 as remote control (including a large collection of IR codes):
BTW: If you have an HP48 and a Linux/UNIX computer, you really must check out "x48", an HP48 emulator for X11:
Some general information about IR remote control:
Some information about IRDA for PCs:
If you have an "One-For-All" universal remote control, the following might help you to get the error rate displayed on a Sony Professional DAT:
Having used these microcontrollers for audio and other projects, I really like them very much ...
Some very good books and articles about digital audio, DAT and electronics: