[RossBencina]

Not sure about "world's first." Here's an album released on Raspberry-Pi Zero from a couple of months back:

"Musician Releases Album as a Live Coding Device on a Raspberry Pi Zero" https://blog.hackster.io/musician-releases-album-as-a-live-c...

[stephencanon]

See also the completely-in-hardware "1-bit symphony" (http://www.1bitsymphony.com/) and innumerable other projects.