Play Sound Every X Seconds

I would like to create a macro that plays a sound every 45 seconds or so. In other words, I would like to have a countdown timer that counts from 45 seconds down to 0 seconds and at the end it plays a sound file(could be mp3, wav, etc) to signal the end. After that it should automatically reset itself back to the start of 45s and count down again. This would be repeated about ten to eleven times. What is the easiest way of doing this? It's too confusing. Lets say the audio file was located in: C:my soundseep.wav