HoloDecks from Lukasz Karluk uses OpenFrameworks to create 3D-printable sculptures from sound:

HoloDecks is an umbrella project for a number of studies which focus on transforming sound through different mediums.

This study begins with a custom application built in openFrameworks which visualises audio from a song by Oneohtrix Point Never, titled Zebra. The base shape chosen for the visualisation is a disc which has always been a ubiquitous shape associated with music storage formats such as compact discs and vinyl records. Audio data from the song displaces the geometry of the disc to create a swirly visual echo of the audios last few seconds.

At any point in the visualisation, a snapshot of the generated 3d model can be taken. OpenFrameworks does a great job at exporting 3D models using the .ply format which then needs to be converted into .obj format so it can be printed with a Makerbot 3D printer.

Up to this point, the sound has been transformed from pure audio data, into a software visualisation and then materialised into the real world using a 3D printer. A final transformation is undertaken by augmenting the 3D printed sound sculpture using a mobile device to see another layer of audio reactive visuals mapped to the object.

Read a nice review at createdigitalmotion.com