Yes, I tried to contact Marko to see if he objected to it's use, but I received no response. I used the sound file, and credited the source.
There is no rule per say, of using sound files without copyrights, still I thought it important to seek his blessing. If he had objected, I would have pulled the file. If he should object to it's use in the future, I will pull the file.
Moreover, there is also a plagiarism issue with scenarios, as one would not want to copy an entire scene or aspect of another's creation, and call it there own.
You might want to try to contact him through e-mail like I did, but at the least credit the source.
I'm looking forward to playing your Designs.
"I take it that this is the Anastasia Scud pines for?" - Epic Commander
"What Ana said. Use sugar and the whip." - aka the Pilot
"I think you will realize the emphasis was on Ana and Cake." - Monk