[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: EEG trigger - technical question

Hi Bastian,

We developed a box that uses the SPDIF digital channel of an RME sound card to send triggers to a 8-bit TTL Neuroscan trigger input port. It works flawlessy and jitter seems to be as low as 1/fs as far as I am concerned. Would you be interested in this? 
Have a great day, from sunny Sydney!


-----Original Message-----
From: Bastian Epp [mailto:bepp@xxxxxxxxxxxxxx] 
Sent: Friday, 20 May 2016 1:27 AM
Subject: EEG trigger - technical question

Hi everyone!

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 though.

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!



This email message and any accompanying attachments may contain information that is confidential and is subject to legal privilege. Confidentiality and legal privilege attached to this communication are not waived or lost by reason of mistaken delivery to you. If you are not the intended recipient, do not read, use, disseminate, distribute or copy this message or attachments. If you have received this message in error, please notify the sender immediately and delete this message. Australian Hearing Services can also be contacted on telephone No. +61 2 9412 6800. Any views expressed in this message are those of the individual sender, except where the sender expressly, and with authority, states them to be the views of Australian Hearing Services. Before opening any attachments, please check them for viruses and defects. Australian Hearing Services accepts no liability for any loss caused either directly or indirectly by a virus arising from the use of this message or any attached file.