This instrument incorporates a familiar human user interface (playing cards) and turns it into a musical interface, that allows notes to be arbitrarily arranged for experimentation by the musician or composer. For a composer, this instrument allows a melody or phrase to be laid out on a table, giving it both a useful fixedness (the musician can walk away and come back to it later) and a capacity to improvise over the melody.
Part of the technical challenge of this instrument is producing a response time acceptable for a musical instrument, despite the inherent delays in reading NFC tags. We identified a way to bend the NFC protocol in order to reduce response time to roughly 1/40 second, with the potential to be reduced further.