Tai Phan Mem Pitch Shifter - Html5 Apr 2026
function patchedCreateAndStartSource(offsetSec) { if (!audioContext || !audioBuffer) return null; if (audioContext.state === 'suspended') audioContext.resume().then(() => patchedCreateAndStartSource(offsetSec)); return null; if (sourceNode) { try sourceNode.stop(); catch(e) {} sourceNode.disconnect(); } const newSource = audioContext.createBufferSource(); newSource.buffer = audioBuffer; const rate = semitonesToRate(currentPitchSemitones); newSource.playbackRate.value = rate; newSource.connect(audioContext.destination); const startTime = audioContext.currentTime; newSource.start(startTime, offsetSec); sourceNode = newSource; window._sourceStartTime = startTime; isPlaying = true; newSource.onended = () => if (sourceNode === newSource) isPlaying = false; // if ended naturally, reset pauseOffset pauseOffset = 0; sourceNode = null; window._sourceStartTime = null; updatePlayButtonsState(); statusTextSpan.innerText = "Stopped"; ; updatePlayButtonsState(); return newSource; }
<!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 */
// If already playing, do nothing if (isPlaying && sourceNode) return; tai phan mem pitch shifter - html5
.pitch-value background: #00000066; padding: 0.25rem 1rem; border-radius: 60px; font-family: 'JetBrains Mono', monospace; font-size: 1.2rem; font-weight: 700; color: #7ad0ff;
.sub color: #8f9bb5; font-weight: 500; border-left: 3px solid #3b82f6; padding-left: 12px; margin: 0 0 1.8rem 0; font-size: 0.85rem; function patchedCreateAndStartSource(offsetSec) { if (
.btn background: #1e2a3e; border: none; padding: 10px 20px; border-radius: 60px; font-weight: 600; color: white; display: inline-flex; align-items: center; gap: 8px; cursor: pointer; transition: 0.1s; flex: 1; justify-content: center; font-size: 0.9rem; box-shadow: 0 3px 6px rgba(0,0,0,0.3); border-bottom: 1px solid #3b82f640;
// Replace pause pauseAudio = patchedPauseAudio; if (sourceNode) { try sourceNode.stop()
// update pause logic using new tracking function patchedPauseAudio() { if (!isPlaying || !sourceNode || !audioContext) return; if (sourceNode && audioContext && window._sourceStartTime !== null) if (sourceNode) { try sourceNode.stop(); catch(e) {} sourceNode.disconnect(); sourceNode = null; } isPlaying = false; window._sourceStartTime = null; updatePlayButtonsState(); statusTextSpan.innerText = "Paused"; }
// 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>
pauseStopBtn.addEventListener('click', () => if (!audioBuffer) return; if (isPlaying) pauseAudio(); else stopAudio(true); statusTextSpan.innerText = "Stopped"; );
// Replace function globally createAndStartSource = patchedCreateAndStartSource.bind(this);
