MidiScope/Application/src/main/java/com/example/android/common/midi/synth/EnvelopeADSR.java [80:105]:
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    public float render() {
        switch (mSstate) {
        case ATTACK:
            mCurrent += mAttackRate;
            if (mCurrent > 1.0f) {
                mCurrent = 1.0f;
                mSstate = DECAY;
            }
            break;
        case DECAY:
            mCurrent -= mDecayRate;
            if (mCurrent < mSustainLevel) {
                mCurrent = mSustainLevel;
                mSstate = SUSTAIN;
            }
            break;
        case RELEASE:
            mCurrent -= mRreleaseRate;
            if (mCurrent < 0.0f) {
                mCurrent = 0.0f;
                mSstate = FINISHED;
            }
            break;
        }
        return mCurrent;
    }
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MidiSynth/Application/src/main/java/com/example/android/common/midi/synth/EnvelopeADSR.java [80:105]:
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    public float render() {
        switch (mSstate) {
        case ATTACK:
            mCurrent += mAttackRate;
            if (mCurrent > 1.0f) {
                mCurrent = 1.0f;
                mSstate = DECAY;
            }
            break;
        case DECAY:
            mCurrent -= mDecayRate;
            if (mCurrent < mSustainLevel) {
                mCurrent = mSustainLevel;
                mSstate = SUSTAIN;
            }
            break;
        case RELEASE:
            mCurrent -= mRreleaseRate;
            if (mCurrent < 0.0f) {
                mCurrent = 0.0f;
                mSstate = FINISHED;
            }
            break;
        }
        return mCurrent;
    }
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