SpeakerBlast: app to play same audio on multiple devices now live [VIDEO]

Now live: the SpeakerBlast web app, which lets you play the same audio track on multiple Internet-connected devices.
In May, Technically Baltimore interviewed Ryan Spahn, one of the developers responsible, but the web app wasn’t yet available.
Spahn recently demonstrated how SpeakerBlast works at July’s Baltimore TechBreakfast:

As Spahn explains in the video, the way SpeakerBlast gets multiple devices to play the same audio file in sync is through alarm-clock technology.