Tai Phan Mem Pitch Shifter - Html5 Jun 2026

// initial setup updatePitchUI(0); updatePlayButtonsState(); // pre-initialize context but suspended (chrome policy) initAudioContext(); if (audioContext) audioContext.suspend(); // initially suspended, will resume on play

if (!audioContext) initAudioContext();

function pauseAudio() { if (!isPlaying || !sourceNode || !audioContext) return; // Capture current playback position: audioContext.currentTime gives the time line, but source started at startTime. // we need to compute offset based on elapsed time of current source considering playbackRate. // Since we need precise offset for resume, we track using audioContext's currentTime and source start metadata. // Simpler approach: get current time from context and compute elapsed from buffer start (startTime) if (sourceNode && audioContext) { // The source started at startTime (which we store when starting). But we didn't store startTime in createAndStartSource. Let's refactor. // better: store sourceStartTime globally. if (window._sourceStartTime !== undefined && audioContext) const now = audioContext.currentTime; const elapsed = (now - window._sourceStartTime) * sourceNode.playbackRate.value; let newOffset = pauseOffset + elapsed; if (newOffset >= audioBuffer.duration) newOffset = audioBuffer.duration; pauseOffset = newOffset; else // fallback: if no start time stored, just keep offset console.warn("fallback pause offset"); tai phan mem pitch shifter - html5

1. Sử dụng các công cụ trực tuyến (Không cần tải) // Simpler approach: get current time from context

input[type="file"] display: none;

Dưới đây là những phương pháp tốt nhất để bạn có thể sở hữu một bộ pitch shifter dạng HTML5. // better: store sourceStartTime globally

.semitone-buttons display: flex; gap: 12px; justify-content: center; margin-top: 16px; flex-wrap: wrap;