In Bb 2.0 is a collaborative music and spoken word project conceived by Darren Solomon from Science for Girls. The videos can be played simultaneously — the soundtracks will work together, and the mix can be adjusted with the individual volume sliders.

For me, more interestingly than adjusting levels is varying each clip’s starting points. I’ve done three go-rounds with this so far and each have been absolutely beautiful. I love bringing in the bass towards the middle and dropping the vocal track right before it. And the horns always round things out.