The K-36s likely had either these whistles (the D&RGW and many other railroads, both domestic and abroad [Canadian and Japanese locomotives frequently have them as well], were quite fond of the Nathan 5 chime), or the mid-pitched hooter whistle frequently heard on K-27 #463 (probably the same whistle 463 carried in its own service years).
A great whistle indeed, here is an interesting one from 484 which has an interesting tune to her in this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-k3AqNi_gyTg.html it was back in the 80s when it was recorded but the whistle has the same vibes feel as the 1980s version on 484 back in the day.
