mydoghasworms

* Rather use https://gist.github.com/mydoghasworms/4888a832e28491c3fe47
* The alternative is a better parser although it is not an emmitter)
*----------------------------------------------------------------------*
*       CLASS json_util DEFINITION
*----------------------------------------------------------------------*
class json_util definition.
  public section.
    class-methods:
      data_to_json importing data type any
                   returning value(json) type string,

alandipert

(import '(javax.sound.midi MidiSystem Synthesizer))

(defn play-note [synth channel note-map]
  (let [{:keys [note velocity duration]
         :or {note 60
              velocity 127
              duration 1000}} note-map]
    (. channel noteOn note velocity)
    (Thread/sleep duration)
    (. channel noteOff note)))