1. What type of file is a file with filename extension ".SGN" ?

2. A tune will be playing, then suddenly stop for a brief period, then start playing again. Occurrence is random. Some time back I think I saw a post that mentioned this problem.

3. At times, a tune will play the designated number of times, and without me doing anything, start playing again. I was using the "next tune" option to go from tune-to-tune.

Before I posted this I searched documentation, the FAQ, and few other places but couldn't find any information.

Thanks in advance for your assistance -