Is it possible to get the current amplitude as the media is being played?

Great stuff!

The project seems exactly what I need but to make sure:

Is it possible to get the current amplitude as the media is being played?

I am thinking of doing a simple visualization and I'd like to get every 0.5s or so the current updated volume/amplitude of the audio being played. If so, how would I get that value (I'm thinking something between 0 and 1)?

Thanks in advance!