From 2dfc84ffe107a8806baeece15f0786ed3f110f08 Mon Sep 17 00:00:00 2001
From: hneemann <helmut.neemann@arcor.de>
Date: Mon, 11 Feb 2019 14:39:08 +0100
Subject: [PATCH] fixed a bug closing the synthesizer

---
 src/main/java/de/neemann/digital/core/io/MIDIHelper.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/de/neemann/digital/core/io/MIDIHelper.java b/src/main/java/de/neemann/digital/core/io/MIDIHelper.java
index 291b4c63f..d77a8633a 100644
--- a/src/main/java/de/neemann/digital/core/io/MIDIHelper.java
+++ b/src/main/java/de/neemann/digital/core/io/MIDIHelper.java
@@ -70,9 +70,9 @@ public final class MIDIHelper {
     }
 
     private void close() {
-        if (!isOpen) {
+        if (isOpen) {
             synthesizer.close();
-            synthesizer = null;
+            isOpen = false;
         }
     }