lili/data-over-audio
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bits based on frequency pairs highest amplitude

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This commit is contained in:
Lewis Moten
2024-05-01 15:02:31 -04:00
parent dc18558d5a
commit dc4ca96259
1 changed files with 6 additions and 4 deletions
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10
index.js
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@@ -141,14 +141,16 @@ function analyzeAudio() {
var i = Math.round(hz / length);
return frequencyData[i] > FREQUENCY_THRESHOLD;
}
function amplitude(hz) {
var length = (audioContext.sampleRate / analyser.fftSize);
var i = Math.round(hz / length);
return frequencyData[i];
}
var high = canHear(FREQUENCY_HIGH);
var low = canHear(FREQUENCY_LOW);
if(high || low) {
if(high && low) listen += '[';
if(high) listen += '1';
if(low) listen += '0';
if(high && low) listen += ']';
listen += amplitude(FREQUENCY_HIGH) > amplitude(FREQUENCY_LOW) ? '1' : '0';
} else {
if(listen !== '') {
receivedDataTextarea.value += listen + '\n';