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EEG trigger - technical question
I have a rather specific and technical question - before starting to
develop something from scratch:
Is there a commercially available solution to translate a digital audio
signal (preferrably from an ADAT channel, otherwise SPDIF) into parallel
TTL (ie "printer port")? I am looking for something (let's call it "THE
BOX") that does not require too much overhead in terms of devices.
Some background information:
We want to send our EEG trigger as a digital number on the sound card in
one channel, along with two channels containing the stimulus. So "THE
BOX" needs to decode the digital signal/number and encodes it onto 0/5V
on a d-sub connector - without jitter!
We do have a box that does it with SPDIF, but I wonder if that is
possible with ADAT directly? Looking into audio forums, it seems doable,
I just couldn't find someone that actually did it. And as I said -
before digging into digital electronics...it looks like a fun project
Any pointers welcome and (of course) I would be willing to share a
concise summary if there is interest.
Thanks in advance and a wonderful day to everyone from sunny Copenhagen!