Tai Phan Mem Pitch Shifter - Html5 Apr 2026

.btn-primary:active background: #1d4ed8;

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; }

// If already playing, do nothing if (isPlaying && sourceNode) return;

.file-label background: #2d3a4b; cursor: pointer; text-align: center; tai phan mem pitch shifter - html5

// Resume / Play from current pauseOffset (or from beginning) function playAudio() if (!audioBuffer) statusTextSpan.innerText = "No audio loaded"; return; if (!audioContext) initAudioContext(); if (!audioContext) return;

pauseStopBtn.addEventListener('click', () => if (!audioBuffer) return; if (isPlaying) pauseAudio(); else stopAudio(true); statusTextSpan.innerText = "Stopped"; );

// If context is closed, re-init if (audioContext.state === 'closed') initAudioContext(); .btn-primary:active background: #1d4ed8

.sub color: #8f9bb5; font-weight: 500; border-left: 3px solid #3b82f6; padding-left: 12px; margin: 0 0 1.8rem 0; font-size: 0.85rem;

input[type="range"] width: 100%; height: 6px; -webkit-appearance: none; background: #2d3246; border-radius: 10px; outline: none; margin: 1rem 0;

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

audioUpload.addEventListener('change', (e) => const file = e.target.files[0]; if (file) loadAudioFile(file); );

/* Pitch control section */ .pitch-area background: #0f121b; border-radius: 2rem; padding: 1.2rem 1.2rem 1.5rem; margin-bottom: 2rem; border: 1px solid #2a2f3f; box-shadow: inset 0 1px 3px #00000030, 0 6px 12px -8px black;

function initAudioContext() window.webkitAudioContext)(); // Enable iOS / auto resume on first user gesture via button, but we will also resume on play return audioContext; if (sourceNode) { try sourceNode.stop()

playBtn.addEventListener('click', () => if (!audioBuffer) statusTextSpan.innerText = "Please load an audio file first"; return; if (!audioContext );

// Replace pause pauseAudio = patchedPauseAudio;