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improve sample rate

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This commit is contained in:
Lewis Moten
2024-05-01 17:37:49 -04:00
parent 859c413a87
commit 48fc56102e
1 changed files with 5 additions and 2 deletions
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7
index.js
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@@ -87,7 +87,8 @@ function handleListeningCheckbox(e) {
microphoneStream = stream;
microphoneNode = audioContext.createMediaStreamSource(stream);
analyser = audioContext.createAnalyser();
analyser.fftSize = 2 ** 12;
analyser.smoothingTimeConstant = 0;
analyser.fftSize = 2 ** 15;
microphoneNode.connect(analyser);
requestAnimationFrame(analyzeAudio);
}
@@ -166,7 +167,7 @@ function evaluateBit(highBits, lowBits) {
if(high || low) {
const now = performance.now();
if(bitStarted) {
if(now - bitStarted > FREQUENCY_DURATION) {
if(now - bitStarted >= FREQUENCY_DURATION) {
received(evaluateBit(bitHighStrength, bitLowStrength));
bitHighStrength.length = 0;
bitLowStrength.length = 0;
@@ -174,6 +175,8 @@ function evaluateBit(highBits, lowBits) {
}
} else {
bitStarted = now;
bitHighStrength.length = 0;
bitLowStrength.length = 0;
}
bitHighStrength.push(amplitude(FREQUENCY_HIGH));
bitLowStrength.push(amplitude(FREQUENCY_LOW));