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@ -70,7 +70,7 @@ class Speaker: public Buzzer {
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this->state.period = 1000000UL / this->state.tone.frequency;
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this->state.counter =
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(this->state.tone.counter * 1000L) / this->state.period;
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(this->state.tone.duration * 1000L) / this->state.period;
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this->state.period >>= 1;
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this->state.counter <<= 1;
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