simplified “instrument” access

history.txt

@@ -3575,6 +3575,7 @@ Fixes:
 * Blocks, Widgets: Added sound feedback to PianoKeyboard
 * New file: symbols.js (moved out of blocks.js)
 * Updated credits to reflect Michael’s piano keyboard design contribution
+* Threads: simplified “instrument” access
 
 
 Features:

threads.js

@@ -61,7 +61,7 @@ StageMorph, SpriteMorph, StagePrompterMorph, Note, modules, isString, copy,
 isNil, WatcherMorph, List, ListWatcherMorph, alert, console, TableMorph,
 TableFrameMorph, ColorSlotMorph, isSnapObject*/
 
-modules.threads = '2017-July-31';
+modules.threads = '2017-August-02';
 
 var ThreadManager;
 var Process;
@@ -3461,7 +3461,7 @@ Process.prototype.doPlayNoteForSecs = function (pitch, secs) {
     if (!this.context.startTime) {
         this.context.startTime = Date.now();
         this.context.activeNote = new Note(pitch);
-        this.context.activeNote.play(this.blockReceiver().instrument);
+        this.context.activeNote.play(this.receiver.instrument);
     }
     if ((Date.now() - this.context.startTime) >= (secs * 1000)) {
         if (this.context.activeNote) {
@@ -3475,7 +3475,7 @@ Process.prototype.doPlayNoteForSecs = function (pitch, secs) {
 };
 
 Process.prototype.doSetInstrument = function (num) {
-    this.blockReceiver().instrument = +num;
+    this.receiver.instrument = +num;
 };
 
 // Process constant input options