1. Music file has been embedded in PPT, not as a link. In this case, even if you don't see the speaker icon, the music will play automatically with the slide show.

2. Music files are added as links, and the linked files still exist in the folder where PPT is located, so music will be played even if there is no small speaker icon.

3.PPT is the abbreviation of PowerPoint, which is a demonstration software developed by Microsoft. Widely used in business reports, education and training, product display and other occasions. PPT allows users to create slides with rich contents such as text, images, charts, videos and animations, and display them on the big screen through the projector, so that the audience can watch and understand the speaker's point of view.