.sub color: #8f9bb5; font-weight: 500; border-left: 3px solid #3b82f6; padding-left: 12px; margin: 0 0 1.8rem 0; font-size: 0.85rem;
playBtn.addEventListener('click', () => audioContext.state === 'closed') initAudioContext(); if (audioContext && audioContext.state === 'suspended') audioContext.resume().then(() => if (isPlaying && sourceNode) return; playAudio(); ).catch(e => console.warn); else playAudio(); ); tai phan mem pitch shifter - html5
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes"> <title>Tai Phần Mềm Pitch Shifter | Real-Time Audio Pitch Shifter (HTML5)</title> <style> * box-sizing: border-box; user-select: none; /* cleaner UI for knobs, but text select allowed */ .sub color: #8f9bb5