QSI made those in the 1990s. They made a number of different sound sets like "station sounds" and "barnyard sounds". I have the station sounds and that's likely what you have. The only adjustment is volume. There are about 8 sound clips and they play at random or on a rotation. The station sounds have announcements like "Now arriving on track 1 ...". There are sounds of automobiles and a baby crying. Very primitive by todays sound standards. I find this is too repetitive and boring to run this very long, so I just turn on briefly when there are guests.
Bill