Sound Track for Slideshow

I am creating a slideshow using Impress and I wish to add a sound track of music for the duration of the show. However, when I “Insert” the desired sound track it only appears as a single slide and merely repeats the same limited number of notes as each slide appears.

Can somebody please give me guidance.

Thank you.

Do NOT click on “Apply to All Slides” under Modify transition. If you have I do not know how it can be reversed.

Regards Bob