13one was written for the trombonist Will Lang. He asked for a thirteen-note piece that could be played solo or in conjunction with other thirteen-note pieces. I decided to make my piece an homage to John Cage on his 100th birthday.

You are welcome to play the version I cast for Will for the premiere, which is in the downloadable score you will find below. Each of the thirteen notes should be played for the duration of one breath at a generally quiet dynamic. The thirteen notes do not need to be played evenly: let your breath determine the duration of each note. Also, if a particular hexagram speaks to your condition, feel free to milk it.


Cast the I Ching using whatever method you prefer. (There is of course an app for this.) Use the chart you will find in the score to translate each resulting hexagram into a note. If the hexagram you cast has changing lines, the next note should be the one associated with the hexagram that results when you change the lines. If your cast for the thirteenth note gives you a hexagram with changing lines, you can

  1. sing the note of the original hexagram while playing the note of the changed version (or vice versa)
  2. vividly imagine the changed version’s note after you finish playing the thirteen written notes
  3. sing the note to yourself at some later time
  4. use it as the first note of your next performance of the piece
  5. invent your own use for the extra note

If you wish, you can play the piece into a very long delay a la Brian Eno. Set the delay to be longer than the duration of any individual note you are likely to play. Depending on the regen you set, the delay can end up keeping all thirteen notes in play, with a fadeout to nothingness as the delays gradually dissipate. A standard delay pedal is not likely to be long enough for this purpose: you will probably need a computer. I have made a Max for Live patch that implements a long delay (up to 13 seconds), which I am happy to send you when you order the performance materials.

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Here is a score of the piece in pdf format.

13one is part of my ongoing project, A Book of Days. You can listen to Matthew Petty’s live performance with the long delay by visiting September 5th.

And you are warmly invited to support this very low-key way of publishing: