wp-includes/ID3/module.tag.id3v2.php:3201$indexintstring public static function SYTLContentTypeLookup($index) { static $SYTLContentTypeLookup = array( 0x00 => 'other', 0x01 => 'lyrics', 0x02 => 'text transcription', 0x03 => 'movement/part name', // (e.g. 'Adagio') 0x04 => 'events', // (e.g. 'Don Quijote enters the stage') 0x05 => 'chord', // (e.g. 'Bb F Fsus') 0x06 => 'trivia/\'pop up\' information', 0x07 => 'URLs to webpages', 0x08 => 'URLs to images' ); return (isset($SYTLContentTypeLookup[$index]) ? $SYTLContentTypeLookup[$index] : ''); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ID3/module.tag.id3v2.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.