aboutsummaryrefslogtreecommitdiffstats
path: root/src/com/jsyn/unitgen/RedNoise.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/com/jsyn/unitgen/RedNoise.java')
-rw-r--r--src/com/jsyn/unitgen/RedNoise.java80
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);
- }
-}