Tai Phan Mem Pitch Shifter - Html5 -

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

/* Audio controls */ .audio-controls display: flex; gap: 18px; justify-content: space-between; flex-wrap: wrap; margin-bottom: 1.8rem;

footer font-size: 0.7rem; text-align: center; margin-top: 2rem; color: #4b556b; tai phan mem pitch shifter - html5

// Replace function globally createAndStartSource = patchedCreateAndStartSource.bind(this);

// semitone quick buttons document.querySelectorAll('.st-btn').forEach(btn => btn.addEventListener('click', () => const shiftVal = parseFloat(btn.getAttribute('data-shift')); if (isNaN(shiftVal)) return; let newVal = currentPitchSemitones + shiftVal; if (newVal > 12) newVal = 12; if (newVal < -12) newVal = -12; updatePitchUI(newVal); if (sourceNode && isPlaying && audioContext && audioContext.state === 'running') sourceNode.playbackRate.value = semitonesToRate(currentPitchSemitones); ); ); .semitone-buttons display: flex

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

// Resume / Play from current pauseOffset (or from beginning) function playAudio() if (!audioBuffer) statusTextSpan.innerText = "No audio loaded"; return; if (!audioContext) initAudioContext(); if (!audioContext) return; footer font-size: 0.7rem

.wave-status background: #03071280; border-radius: 50px; padding: 8px 16px; font-size: 0.8rem; font-family: monospace; color: #9ca3af; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; margin-top: 1rem;

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

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

// Create a new source from current audioBuffer, applying current pitch rate, and start at 'when' (relative to ctx currentTime) // offsetSec: where to start in buffer (seconds) function createAndStartSource(offsetSec) { if (!audioContext || !audioBuffer) return null; // ensure context is running (resume if suspended) if (audioContext.state === 'suspended') audioContext.resume().then(() => createAndStartSource(offsetSec); ).catch(e => console.warn("AudioContext resume failed", e)); return null; // Stop existing source if any if (sourceNode) { try sourceNode.stop(); catch(e) {} sourceNode.disconnect(); sourceNode = null; }