Back in the olden days, people used to listen to music on flat plastic discs covered in tiny grooves. A needle on the end of an arm would bounce around in these tiny grooves as the disc span, and the vibration was amplified electronically to produce music. It was the best of times, it was the worst of times.
Amanda Ghassaei used a UV-cured resin printer called the Objet Connex500, which has a resolution of 600 dpi in the x and y axis, and 16 microns in the z axis to create a playable record (a film of WD-40 is about 17 microns deep). Despite that, the grooves on the 3D-printed record are about ten times deeper and ten times wider than those on a pressed vinyl record, so the 3D-printed record can’t hold anywhere near as much audio as a pressed record.