Different types of whistles - brass, aluminum, plastic, PVC

I've been asked several times to do a comparison between various types of whistle materials and I've hesitated because I really only play one in the key of D - but it turns out I have a bunch in the key of C, so I used that as my comparison here. My go-to whistles are all made by Gary Humphrey (http://web.blomand.net/~ghumphrey/) so if you're looking for something quality, check him out. Follow me on Instagram: https://www.instagram.com/whistletutor/ Calendar and information about private lessons: http://whistletutor.com