err nope, there must be something wrong with it then. never heard sounds other than in-game ones before lol

Never heard of this problem before on the DS, but this was an issue with the old Palm Tungsten and Treo models, where the digitizer which handles the touchscreen function was the culprit. Replacing the digitizer usually fixes the problem.

Since you just got your DSL, you might as well ask for a new replacement.