"Communion" is composed of two found objects, both crystal urns of similar composition yet varying size. Both of these urns were inlaid with gold leaf, and two speakers of the same stereo system were suspended in the mouth of both urns with golden wire.
Each urn was struck, and its resonant fundamental frequency was measured and noted in a frequency spectrometer. Two artificial audio tracks were created, one for each urn, consisting of a sine wave of that urns fundamental frequency as well as two matching proportionate overtone frequencies.
Over the course of 3 minutes each urn would play its created tone at irregular intervals, with the occasional swapping of tones between the urns via rapid panning. The tone began at a low volume and rose in a steep crescendo while it pulsed. The artificial frequency audio track was so attuned to each crystal urn that as the pulse resolved, the glass would continue to resonate even as the speaker stopped playing its tone.