Learner record voice and save for playback later

I am developing three foreign language courses right now and one of the stipulations is that the learner be able to record their speaking the language and play it back--maybe against a prerecorded version by a native speaker. At this point, we don't have to have a graded assessment--just a self-assessment. 

We have to have the courses playable on a variety of browsers as well as mobile devices--so javascript code is not really an option. 

Any suggestions would be greatly appreciated. I'm trying convince my team that Storyline is the way to go.