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Diffstat (limited to 'src/com/jsyn/unitgen/RedNoise.java')
-rw-r--r-- | src/com/jsyn/unitgen/RedNoise.java | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/src/com/jsyn/unitgen/RedNoise.java b/src/com/jsyn/unitgen/RedNoise.java deleted file mode 100644 index d3e4321..0000000 --- a/src/com/jsyn/unitgen/RedNoise.java +++ /dev/null @@ -1,80 +0,0 @@ -/* - * Copyright 1997 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; - -import com.jsyn.util.PseudoRandom; - -/** - * RedNoise unit. This unit interpolates straight line segments between pseudo-random numbers to - * produce "red" noise. It is a grittier alternative to the white generator WhiteNoise. It is also - * useful as a slowly changing random control generator for natural sounds. Frequency port controls - * the number of times per second that a new random number is chosen. - * - * @author (C) 1997 Phil Burk, SoftSynth.com - * @see WhiteNoise - */ -public class RedNoise extends UnitOscillator { - private PseudoRandom randomNum; - protected double prevNoise, currNoise; - - /* Define Unit Ports used by connect() and set(). */ - public RedNoise() { - super(); - randomNum = new PseudoRandom(); - } - - @Override - public void generate(int start, int limit) { - double[] amplitudes = amplitude.getValues(); - double[] frequencies = frequency.getValues(); - double[] outputs = output.getValues(); - double currPhase = phase.getValue(); - double phaseIncrement, currOutput; - - double framePeriod = getFramePeriod(); - - for (int i = start; i < limit; i++) { - // compute phase - phaseIncrement = frequencies[i] * framePeriod; - - // verify that phase is within minimums and is not negative - if (phaseIncrement < 0.0) { - phaseIncrement = 0.0 - phaseIncrement; - } - if (phaseIncrement > 1.0) { - phaseIncrement = 1.0; - } - - currPhase += phaseIncrement; - - // calculate new random whenever phase passes 1.0 - if (currPhase > 1.0) { - prevNoise = currNoise; - currNoise = randomNum.nextRandomDouble(); - // reset phase for interpolation - currPhase -= 1.0; - } - - // interpolate current - currOutput = prevNoise + (currPhase * (currNoise - prevNoise)); - outputs[i] = currOutput * amplitudes[i]; - } - - // store new phase - phase.setValue(currPhase); - } -} |