= htmlspecialchars($trackTitle, ENT_QUOTES, 'UTF-8') ?>
(= htmlspecialchars($mix, ENT_QUOTES, 'UTF-8') ?>)
= (int)($track['track_no'] ?? 0) > 0 ? '#' . (int)$track['track_no'] : 'Track' ?>
= !empty($track['duration']) ? ' - ' . htmlspecialchars((string)$track['duration'], ENT_QUOTES, 'UTF-8') : '' ?>
= !empty($track['bpm']) ? ' - ' . htmlspecialchars((string)$track['bpm'], ENT_QUOTES, 'UTF-8') . ' BPM' : '' ?>
= !empty($track['key_signature']) ? ' - ' . htmlspecialchars((string)$track['key_signature'], ENT_QUOTES, 'UTF-8') : '' ?>