const audioCtx = new AudioContext(); await audioCtx.audioWorklet.addModule('pitch-shifter-processor.js'); const shifter = new AudioWorkletNode(audioCtx, 'pitch-shifter'); // Connect microphone or file navigator.mediaDevices.getUserMedia( audio: true ) .then(stream => const source = audioCtx.createMediaStreamSource(stream); source.connect(shifter).connect(audioCtx.destination); ); shifter.parameters.get('pitchShift').value = 1.5; // raise pitch
// handle semitone conversion: semitones to playbackRate ratio (2^(semitones/12)) function setPitchBySemitone(semitones) let ratio = Math.pow(2, semitones / 12); ratio = Math.min(2.0, Math.max(0.5, ratio)); pitchSlider.value = ratio.toFixed(3); currentPitch = ratio; pitchReadout.innerText = ratio.toFixed(2) + 'x'; if (currentBuffer) if (isPlaying) playWithPitch(ratio); else // if not playing, just store value but also can optionally restart // but we keep consistent tai phan mem pitch shifter - html5
: This powerful framework includes a PitchShift effect that simplifies the process of routing audio through a shifter in the browser. const audioCtx = new AudioContext(); await audioCtx