ADD WATER MARK BEFORE AND AFTER THE TRACK

I HAVE NEWS BULLETINS WHICH START WITH A CERTAIN SOUND AND END WITH A CERTAIN SOUND… THIS IS SOMETHING I HAVE TO DO EVERY DAY… START WATERMARK…NEWS… END WATERMARK… EDITING 30 TRACKS[NEWS] TO ADD START AND END WATERMARK CAN BE DRAINING… THIS IS WHY I BOUGHT THIS SOFTWARE… BUT UNFORTUNATELY IT ONLY WORKED FOR ONE TRACK BUT NOT FOR BULK… WITH POPULAR CONVERTERS THIS IS CALLED MERGING… MERGE THE START THE NEWS AND THE ENDING AND YOU GET THE RESULT… BUT MANY DONT DO THIS IN BULK. SO PLEASE PROVIDE THIS FEATURE ITS VERY USEFUL.THANKS IN ADVANCE!