forked from forktown/watch-party
79 lines
2.4 KiB
JavaScript
79 lines
2.4 KiB
JavaScript
export const pling = () => {
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const maxGain = 0.3;
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const duration = 0.22;
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const fadeDuration = 0.1;
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const secondBeepOffset = 0.05;
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const thirdBeepOffset = 2 * secondBeepOffset;
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const ctx = new AudioContext();
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const firstBeepGain = ctx.createGain();
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firstBeepGain.connect(ctx.destination);
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firstBeepGain.gain.setValueAtTime(0.01, ctx.currentTime);
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firstBeepGain.gain.exponentialRampToValueAtTime(
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maxGain,
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ctx.currentTime + fadeDuration
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);
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firstBeepGain.gain.setValueAtTime(
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maxGain,
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ctx.currentTime + (duration - fadeDuration)
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);
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firstBeepGain.gain.exponentialRampToValueAtTime(
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0.01,
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ctx.currentTime + duration
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);
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const firstBeep = ctx.createOscillator();
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firstBeep.connect(firstBeepGain);
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firstBeep.frequency.value = 400;
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firstBeep.type = "sine";
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const secondBeepGain = ctx.createGain();
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secondBeepGain.connect(ctx.destination);
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secondBeepGain.gain.setValueAtTime(0.01, ctx.currentTime + secondBeepOffset);
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secondBeepGain.gain.exponentialRampToValueAtTime(
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maxGain,
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ctx.currentTime + secondBeepOffset + fadeDuration
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);
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secondBeepGain.gain.setValueAtTime(
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maxGain,
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ctx.currentTime + secondBeepOffset + (duration - fadeDuration)
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);
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secondBeepGain.gain.exponentialRampToValueAtTime(
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0.01,
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ctx.currentTime + secondBeepOffset + duration
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);
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const secondBeep = ctx.createOscillator();
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secondBeep.connect(secondBeepGain);
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secondBeep.frequency.value = 600;
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secondBeep.type = "sine";
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const thirdBeepGain = ctx.createGain();
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thirdBeepGain.connect(ctx.destination);
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thirdBeepGain.gain.setValueAtTime(0.01, ctx.currentTime + thirdBeepOffset);
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thirdBeepGain.gain.exponentialRampToValueAtTime(
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maxGain,
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ctx.currentTime + thirdBeepOffset + fadeDuration
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);
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thirdBeepGain.gain.setValueAtTime(
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maxGain,
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ctx.currentTime + thirdBeepOffset + (duration - fadeDuration)
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);
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thirdBeepGain.gain.exponentialRampToValueAtTime(
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0.01,
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ctx.currentTime + thirdBeepOffset + duration
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);
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const thirdBeep = ctx.createOscillator();
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thirdBeep.connect(thirdBeepGain);
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thirdBeep.frequency.value = 900;
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thirdBeep.type = "sine";
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firstBeep.start(ctx.currentTime);
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firstBeep.stop(ctx.currentTime + duration);
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secondBeep.start(ctx.currentTime + secondBeepOffset);
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secondBeep.stop(ctx.currentTime + (secondBeepOffset + duration));
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thirdBeep.start(ctx.currentTime + thirdBeepOffset);
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thirdBeep.stop(ctx.currentTime + (thirdBeepOffset + duration));
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};
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