wp-includes/ID3/module.audio.dts.php:239$indexintint|false public static function bitPerSampleLookup($index) { static $lookup = array( 0 => 16, 1 => 20, 2 => 24, 3 => 24, ); return (isset($lookup[$index]) ? $lookup[$index] : false); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ID3/module.audio.dts.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.