1 files changed, 0 insertions, 76 deletions
diff --git a/src/com/jsyn/unitgen/SawtoothOscillatorDPW.java b/src/com/jsyn/unitgen/SawtoothOscillatorDPW.java
deleted file mode 100644
index 27d0c5a..0000000
--- a/src/com/jsyn/unitgen/SawtoothOscillatorDPW.java
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * 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.unitgen;
-
-/**
- * Sawtooth DPW oscillator (a sawtooth with reduced aliasing).
- * Based on a paper by Antti Huovilainen and Vesa Valimaki:
- * http://www.scribd.com/doc/33863143/New-Approaches-to-Digital-Subtractive-Synthesis
- *
- * @author Phil Burk and Lisa Tolentino (C) 2009 Mobileer Inc
- */
-public class SawtoothOscillatorDPW extends UnitOscillator {
-    // At a very low frequency, switch from DPW to raw sawtooth.
-    private static final double VERY_LOW_FREQUENCY = 2.0 * 0.1 / 44100.0;
-    private double z1;
-    private double z2;
-
-    @Override
-    public void generate(int start, int limit) {
-        double[] frequencies = frequency.getValues();
-        double[] amplitudes = amplitude.getValues();
-        double[] outputs = output.getValues();
-
-        // Variables have a single value.
-        double currentPhase = phase.getValue();
-
-        for (int i = start; i < limit; i++) {
-            /* Generate raw sawtooth phaser. */
-            double phaseIncrement = convertFrequencyToPhaseIncrement(frequencies[i]);
-            currentPhase = incrementWrapPhase(currentPhase, phaseIncrement);
-
-            /* Square the raw sawtooth. */
-            double squared = currentPhase * currentPhase;
-            // Differentiate using a delayed value.
-            double diffed = squared - z2;
-            z2 = z1;
-            z1 = squared;
-
-            /* Calculate scaling based on phaseIncrement */
-            double pinc = phaseIncrement;
-            // Absolute value.
-            if (pinc < 0.0) {
-                pinc = 0.0 - pinc;
-            }
-
-            double dpw;
-            // If the frequency is very low then just use the raw sawtooth.
-            // This avoids divide by zero problems and scaling problems.
-            if (pinc < VERY_LOW_FREQUENCY) {
-                dpw = currentPhase;
-            } else {
-                dpw = diffed * 0.25 / pinc;
-            }
-
-            outputs[i] = amplitudes[i] * dpw;
-        }
-
-        // Value needs to be saved for next time.
-        phase.setValue(currentPhase);
-    }
-
-}