A significant portion of Kanda 4 is dedicated to the Ashvamedha, one of the most grand royal rituals of ancient India.
If you are looking for specific resources to study or listen to these chants, I can help you find: Krishna Yajurveda Ghanam Pdf 427
To give you the flavor of what page 1 of PDF 427 contains, here is a transliteration of the original mantra followed by the Ghana start: A significant portion of Kanda 4 is dedicated