Hello and happy new year!
As instructed, I inserted the audio file with the HTML LINK into the 3D flipbook on page 6 (for pages 6 and 7). It worked great. The audio file starts playing as soon as I open the page.
Now I wanted to do the same thing on the following page (8 and 9) because these pages belong together. So I entered the HTML code on page 8 as well. Unfortunately, the audio file on pages 6 and 7 is only played for one second and there is no sound on pages 8 and 9.
What can I do?