audioUpload.addEventListener('change', (e) => const file = e.target.files[0]; if (file) loadAudioFile(file); );
<div class="wave-status" id="statusArea"> <span>📀 Status: </span><span id="statusText" class="active-badge">No track loaded</span> <span id="fileInfo">—</span> </div> <footer> ⚙️ Real-time pitch shifting using <strong>playbackRate</strong> + resampling technique (preserves formants? no — classic speed/pitch). <br> For natural pitch shift without speed change, advanced FFT is needed, but this classic shifter is perfect for real-time demo & fun.<br> 🎧 Drag/Drop or click to upload any audio file. Works offline. </footer> </div> tai phan mem pitch shifter - html5
.btn-primary:active background: #1d4ed8; audioUpload
// 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> Works offline
playBtn.addEventListener('click', () => );
.active-badge color: #34d399; font-weight: bold;
.sub color: #8f9bb5; font-weight: 500; border-left: 3px solid #3b82f6; padding-left: 12px; margin: 0 0 1.8rem 0; font-size: 0.85rem;