26 lines
612 B
JavaScript
26 lines
612 B
JavaScript
function bitsToSamples(bits, samplerate, one_freq, zero_freq) {
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let clock = 1000000;
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let cycles = bits.map(b=>{
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if(b==1) return samplerate / one_freq; // 1000 Hz
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else return samplerate / zero_freq; // 2000 Hz
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});
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let samples = [];
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let volume = 0.75;
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let ptr = 0;
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for(let i=0;i<cycles.length;i++) {
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let nsamples = cycles[i];
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while(ptr<nsamples) {
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if(ptr<nsamples/2) samples.push(volume);
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else samples.push(-volume);
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ptr++;
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}
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ptr-=nsamples;
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}
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return samples;
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}
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module.exports = { bitsToSamples }; |