Interesting. I would be interested if someone can do this. I do not think it is possible, in Word, to play sound files at a given point in time. I have never tried to use the byte point parameter macropods suggests be used. I have NO idea how I could get a byte level accuracy to pinpoint a given start in time. I have been doing fairly serious sound recording for 40 years and I do not know how I could do this.

I will keep an eye on this, but I think you will have to break up your large sound file into lots of small ones. That will likely be a major pain.