bugfix for null element
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@ -64,7 +64,10 @@ function operateModulator(center, freq, amp, waveType, phaseArr, phaseI, delta,
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let oldPhase = phaseArr[phaseI];
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let newPhase = (oldPhase + freq * delta) % 1.00;
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let unscaled = indexWave(waveType, newPhase);
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document.getElementById(`slider-${name}`).value = unscaled;
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let el = document.getElementById(`slider-${name}`);
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if (el)
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el.value = unscaled;
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phaseArr[phaseI] = newPhase;
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return unscaled * amp + center;
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