As I say in the title, is there a way to record and add audio on the PDF?
What I'm trying to achieve is a functionallity similar to the Comment. I would like to have a button to record audio and then add a "Play" button next to some part of the PDF that when it is pressed it plays the previously recorded audio. Just like when I press the "Add comment" button it allows me to write some text and add it in the PDF.
If you are asking if this is possible using Embed API, then yes, you can create that sort of functionality but it will only work inside the Embed API experience that you create. You'll need to modify the PDF using another tool if you want audio annotations to work in other PDF viewers that support audio.
If this is acceptable, I can describe the technique in a future reply.