function webWavPlay(f32array){ const blob = float32ArrayToWav(f32array) const url = createObjectUrlFromBlob(blob) playAudioFromUrl(url) return blob } function createObjectUrlFromBlob(blob) { const url = URL.createObjectURL(blob); return url; } function playAudioFromUrl(url) { const audio = new Audio(url); audio.play().catch(error => console.error('Failed to play audio:', error)); } //I copied //https://huggingface.co/spaces/k2-fsa/web-assembly-tts-sherpa-onnx-de/blob/main/app-tts.js // this function is copied/modified from // https://gist.github.com/meziantou/edb7217fddfbb70e899e function float32ArrayToWav(floatSamples, sampleRate=22050) { let samples = new Int16Array(floatSamples.length); for (let i = 0; i < samples.length; ++i) { let s = floatSamples[i]; if (s >= 1) s = 1; else if (s <= -1) s = -1; samples[i] = s * 32767; } let buf = new ArrayBuffer(44 + samples.length * 2); var view = new DataView(buf); // http://soundfile.sapp.org/doc/WaveFormat/ // F F I R view.setUint32(0, 0x46464952, true); // chunkID view.setUint32(4, 36 + samples.length * 2, true); // chunkSize // E V A W view.setUint32(8, 0x45564157, true); // format // // t m f view.setUint32(12, 0x20746d66, true); // subchunk1ID view.setUint32(16, 16, true); // subchunk1Size, 16 for PCM view.setUint32(20, 1, true); // audioFormat, 1 for PCM view.setUint16(22, 1, true); // numChannels: 1 channel view.setUint32(24, sampleRate, true); // sampleRate view.setUint32(28, sampleRate * 2, true); // byteRate view.setUint16(32, 2, true); // blockAlign view.setUint16(34, 16, true); // bitsPerSample view.setUint32(36, 0x61746164, true); // Subchunk2ID view.setUint32(40, samples.length * 2, true); // subchunk2Size let offset = 44; for (let i = 0; i < samples.length; ++i) { view.setInt16(offset, samples[i], true); offset += 2; } return new Blob([view], {type: 'audio/wav'}); } export { webWavPlay };