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35 lines
1.2 KiB
35 lines
1.2 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;
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/**
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* An interface for any module that shapes a sound based on something like keyboard keys being
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* pressed and released.
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*/
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public interface Envelope extends SignalProvider {
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/**
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* Called to tell the envelope that the key has been pressed.
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* @param retriggerIfOn - A (hopefully temporary) hack. Tells whether to treat this as a new
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* press if the key is already down.
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*/
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public abstract void turnOn(boolean retriggerIfOn);
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/**
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* Called to tell the envelope the key has been released.
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*/
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public abstract void turnOff();
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}
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