= (int)($track['track_no'] ?? 0) > 0 ? (int)$track['track_no'] : '�' ?>
= htmlspecialchars((string)$track['title'], ENT_QUOTES, 'UTF-8') ?>
(= htmlspecialchars((string)$track['mix_name'], ENT_QUOTES, 'UTF-8') ?>)
= 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') : '' ?>