1 files changed, 114 insertions, 0 deletions
diff --git a/src/main/java/com/jsyn/instruments/NoiseHit.java b/src/main/java/com/jsyn/instruments/NoiseHit.java
new file mode 100644
index 0000000..b8714fc
--- /dev/null
+++ b/src/main/java/com/jsyn/instruments/NoiseHit.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2009 Phil Burk, Mobileer Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jsyn.instruments;
+
+import com.jsyn.ports.UnitOutputPort;
+import com.jsyn.unitgen.Circuit;
+import com.jsyn.unitgen.EnvelopeAttackDecay;
+import com.jsyn.unitgen.PinkNoise;
+import com.jsyn.unitgen.UnitVoice;
+import com.jsyn.util.VoiceDescription;
+import com.softsynth.shared.time.TimeStamp;
+
+/**
+ * Cheap synthetic cymbal sound.
+ */
+public class NoiseHit extends Circuit implements UnitVoice {
+    EnvelopeAttackDecay ampEnv;
+    PinkNoise noise;
+    private static final int NUM_PRESETS = 3;
+
+    public NoiseHit() {
+        // Create unit generators.
+        add(noise = new PinkNoise());
+        add(ampEnv = new EnvelopeAttackDecay());
+        noise.output.connect(ampEnv.amplitude);
+
+        ampEnv.export(this, "Amp");
+
+        // Make the circuit turn off when the envelope finishes to reduce CPU load.
+        ampEnv.setupAutoDisable(this);
+
+        usePreset(0);
+    }
+
+    @Override
+    public void noteOff(TimeStamp timeStamp) {
+    }
+
+    @Override
+    public void noteOn(double freq, double ampl, TimeStamp timeStamp) {
+        noise.amplitude.set(ampl, timeStamp);
+        ampEnv.input.trigger();
+    }
+
+    @Override
+    public UnitOutputPort getOutput() {
+        return ampEnv.output;
+    }
+
+    @Override
+    public void usePreset(int presetIndex) {
+        int n = presetIndex % NUM_PRESETS;
+        switch (n) {
+            case 0:
+                ampEnv.attack.set(0.001);
+                ampEnv.decay.set(0.1);
+                break;
+            case 1:
+                ampEnv.attack.set(0.03);
+                ampEnv.decay.set(1.4);
+                break;
+            default:
+                ampEnv.attack.set(0.9);
+                ampEnv.decay.set(0.3);
+                break;
+        }
+    }
+
+    static class MyVoiceDescription extends VoiceDescription {
+        static String[] presetNames = {
+                "ShortNoiseHit", "LongNoiseHit", "SlowNoiseHit"
+        };
+        static String[] tags = {
+                "electronic", "noise"
+        };
+
+        public MyVoiceDescription() {
+            super("NoiseHit", presetNames);
+        }
+
+        @Override
+        public UnitVoice createUnitVoice() {
+            return new NoiseHit();
+        }
+
+        @Override
+        public String[] getTags(int presetIndex) {
+            return tags;
+        }
+
+        @Override
+        public String getVoiceClassName() {
+            return NoiseHit.class.getName();
+        }
+    }
+
+    public static VoiceDescription getVoiceDescription() {
+        return new MyVoiceDescription();
+    }
+}