Brainshark is a web application with lets add audio descriptions to your slideshow presentations or pictures.
It’s very easy to use, you only have to upload your ppt or pictures and then you can start adding your audio descriptions using your microphone and directly on the website. You have to record a description for each picture or slide separately, but the procedure is very simple; once you finish with a slide, you click on “save” and continue with the next one. The result is a video with slides or photographs and its related audio.
You can embed it, share it via email or on your favourite social networks.
Unfortunately, it can’t be embedded here on WordPress, but I you can visit this link to see an example. The presentation is a Guide to Facebook security.
We can do the same with Slideshare, though the procedure is different. You have to upload your ppt and your audio separately and then synchronize it online. This tool has the possibility of being embedded on WordPress.com.