automated patternify, pseudo getters, string hacks

repl/src/midi.ts

@@ -28,6 +28,7 @@ Pattern.prototype.midi = function (output: string, channel = 1) {
   return this.fmap((value: any) => ({
     ...value,
     onTrigger: (time: number, event: any) => {
+      value = value.value || value;
       if (!isNote(value)) {
         throw new Error('not a note: ' + value);
       }