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48 lines
1.6 KiB
48 lines
1.6 KiB
/*
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* Copyright 2010 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.levien.synthesizer.core.model.modules;
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import com.levien.synthesizer.core.model.SignalProvider;
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import com.levien.synthesizer.core.model.SynthesisTime;
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/**
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* Module to modulate an amplitude over time based on a modulator signal. Its output is intended to
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* be fed into an amplifier.
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*/
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public class Tremolo implements SignalProvider {
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/**
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* Creates a Tremolo module.
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* @param modulator - Waveform that modulates the amplitude.
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* @param depth - Depth of amplitude modulation.
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*/
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public Tremolo(SignalProvider modulator, SignalProvider depth) {
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modulator_ = modulator;
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depth_ = depth;
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}
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public double getValue(SynthesisTime time) {
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double modulator = modulator_.getValue(time);
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double depth = depth_.getValue(time);
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return (modulator * (depth / 2.0)) + (1.0 - depth / 2.0);
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}
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// Waveform that modulates the amplitude.
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private SignalProvider modulator_;
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// Depth of amplitude modulation.
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private SignalProvider depth_;
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}
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