SONAR will most definitely "sync" to SMPTE.
But:
"Sonar P is the generator for various time codes"I always "striped" track 8 with the MOTU.
**SONAR (Cakewalk 3 for me) "reads" the code.**
That's incorrect, the MOTU "reads" the analog signal and passes it along to the SONAR.
Mine had a parallel printer port, I tried one that was USB and never got it to work.
"MTC and SMPTE via midi out to the 688"I could be wrong here, and I sold the 688 years ago so I can't test.
BUT, MTC and SMPTE are analog signals, out via midi; I don't think so.
I "recorded" it, I don't have a manual anymore, but it was an analog input.
Do you have any old cassettes that have time code?
(added)
As far as I know you'll still need hardware to sync the computer and the 688.
You need to go here
http://motu.com/products/midi/micro_usb T