Alex,

If you want to send ttl signals in MediaLab, all you need to do is use the ttl signal functionality in the parameter(s) field of the item in your .que file. You can find instructions about this here http://www.empirisoft.com/medialab/h...meters.htm#ttl.

Use of the comport.txt file is for MediaLab receiving ttl signals. If that is something you wish, I'll be happy to help there as well.