For today I built a very brief MIDI conversion of the data. I wanted to hear it without strong filtering, so there's no gating of the signal and no duration or threshold moderation. The result is pretty cacophonous, so I don't recommend it, but here it is. However, I think something interesting is that you can see propagation of the wave through the brain, in the MIDI data above.
Also, you can see what the task looks like (originally from the Wandell lab) here: