--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/sound/sampled/Mixers/PhantomMixers.java	Mon Oct 31 14:50:09 2016 +0300
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.DataLine;
+import javax.sound.sampled.Line;
+import javax.sound.sampled.Mixer;
+import javax.sound.sampled.SourceDataLine;
+import javax.sound.sampled.TargetDataLine;
+
+/**
+ * @test
+ * @bug 4794104
+ * @summary mixers are always present, independent of available soundcards
+ * @run main/manual PhantomMixers
+ */
+public class PhantomMixers {
+
+    public static void main(String args[]) throws Exception {
+        int SDLformats = 0;
+        int TDLformats = 0;
+        Mixer.Info[] mixerInfo = AudioSystem.getMixerInfo();
+        for(int i=0; i<mixerInfo.length; i++){
+            Mixer.Info thisMixerInfo = mixerInfo[i];
+            System.out.println("Mixer #"+i+": "
+                               + thisMixerInfo.getName()
+                               + ": " + thisMixerInfo.getDescription());
+            Mixer mixer = AudioSystem.getMixer(thisMixerInfo);
+            Line.Info[] srcLineInfo = mixer.getSourceLineInfo();
+            Line.Info[] dstLineInfo = mixer.getTargetLineInfo();
+            int count = srcLineInfo.length + dstLineInfo.length;
+            System.out.print(" -> " + (srcLineInfo.length + dstLineInfo.length) + " line");
+            switch (count) {
+                case 0: System.out.println("s"); break;
+                case 1: System.out.println(""); break;
+                default: System.out.println("s:"); break;
+            }
+            int l;
+            for (l = 0; l < srcLineInfo.length; l++) {
+                System.out.println("    "+srcLineInfo[l].toString());
+                if (srcLineInfo[l].getLineClass() == SourceDataLine.class
+                    && (srcLineInfo[l] instanceof DataLine.Info)) {
+                    SDLformats += ((DataLine.Info) srcLineInfo[l]).getFormats().length;
+                }
+            }
+            for (l = 0; l < dstLineInfo.length; l++) {
+                System.out.println("    "+dstLineInfo[l].toString());
+                if (dstLineInfo[l].getLineClass() == TargetDataLine.class
+                    && (dstLineInfo[l] instanceof DataLine.Info)) {
+                    TDLformats += ((DataLine.Info) dstLineInfo[l]).getFormats().length;
+                }
+            }
+        }
+        if (mixerInfo.length == 0) {
+            System.out.println("[no mixers present]");
+        }
+        System.out.println(""+SDLformats+" total formats for SourceDataLines");
+        System.out.println(""+TDLformats+" total formats for TargetDataLines");
+        System.out.println("");
+        System.out.println("If there are audio devices correctly installed on your");
+        System.out.println("system, you should see at least one Mixer, and in total");
+        System.out.println("at least each one SourceDataLine and TargetDataLine, both");
+        System.out.println("providing at least one format.");
+        System.out.println("");
+        System.out.println("Now disable your soundcard and repeat the test.");
+        System.out.println("The corresponding mixer(s) should not provide any formats");
+        System.out.println("anymore. If you disable all available soundcards");
+        System.out.println("on your computer, the number of formats above should be");
+        System.out.println("0 for both line types (although mixers are allowed to exist).");
+    }
+}