Tai Phan Mem Pitch Shifter - Html5 -

.knob-label display: flex; justify-content: space-between; font-weight: 600; color: #ccd6f0; margin-bottom: 0.5rem;

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

.st-btn.reset background: #334155; color: white; tai phan mem pitch shifter - html5

const result = createAndStartSource(startOffset); if (result) statusTextSpan.innerText = "Playing"; // ensure context running if (audioContext.state === 'suspended') audioContext.resume();

.btn-primary background: #2563eb; color: white; border-bottom-color: #93c5fd; .knob-label display: flex

// load and decode audio file async function loadAudioFile(file) if (!file) return; statusTextSpan.innerText = "Loading..."; fileInfoSpan.innerText = file.name; const arrayBuffer = await file.arrayBuffer(); if (!audioContext) initAudioContext(); // ensure context not closed if (audioContext.state === 'closed') initAudioContext(); try const decoded = await audioContext.decodeAudioData(arrayBuffer); audioBuffer = decoded; // Reset state stopAudio(true); pauseOffset = 0; isPlaying = false; updatePlayButtonsState(); statusTextSpan.innerText = "Loaded"; fileInfoSpan.innerText = `$file.name ($decoded.duration.toFixed(1)s)`; // reset pitch display to 0 semitone for new track if (currentPitchSemitones !== 0) currentPitchSemitones = 0; updatePitchUI(0); else updatePitchUI(0); catch (err) console.error(err); statusTextSpan.innerText = "Decode error"; fileInfoSpan.innerText = "Invalid audio"; audioBuffer = null; updatePlayButtonsState();

// Helper: convert semitones to playback rate function semitonesToRate(semitones) // pitch shift formula: rate = 2^(semitones/12) return Math.pow(2, semitones / 12); .semitone-buttons display: flex

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

input[type="range"]:focus outline: none;