// If context is closed, re-init if (audioContext.state === 'closed') initAudioContext();
// initial setup updatePitchUI(0); updatePlayButtonsState(); // pre-initialize context but suspended (chrome policy) initAudioContext(); if (audioContext) audioContext.suspend(); // initially suspended, will resume on play statusTextSpan.innerText = "Ready — load audio"; })(); </script> </body> </html> tai phan mem pitch shifter - html5
.active-badge color: #34d399; font-weight: bold; // If context is closed, re-init if (audioContext
// Resume / Play from current pauseOffset (or from beginning) function playAudio() if (!audioBuffer) statusTextSpan.innerText = "No audio loaded"; return; if (!audioContext) initAudioContext(); if (!audioContext) return; // If context is closed
playBtn.addEventListener('click', () => );
// Update UI from current semitone value function updatePitchUI(semitones) currentPitchSemitones = semitones; pitchSlider.value = semitones; const sign = semitones >= 0 ? '+' : ''; pitchDisplay.innerText = `$sign$semitones.toFixed(1) semitones`; const rate = semitonesToRate(semitones); pitchFactorSpan.innerText = rate.toFixed(4); // If a source is active and playing, we need to update playbackRate dynamically if (sourceNode && isPlaying && audioContext && audioContext.state === 'running') try sourceNode.playbackRate.value = rate; catch(e) /* ignore if source disconnected */
// Event binding pitchSlider.addEventListener('input', (e) => { const val = parseFloat(e.target.value); updatePitchUI(val); // If currently playing, dynamically update the playback rate on the fly if (sourceNode && isPlaying && audioContext && audioContext.state === 'running') { try sourceNode.playbackRate.value = semitonesToRate(currentPitchSemitones); catch(err) {} } });