Marimba vs. Xylophone vs. Vibraphone vs. Glockenspiel (Idiophone Comparison) Musser M500 M75 Jenco

Today I have a collection of idiophones, instruments who produce sound with bars. I'm missing a couple of important idiophones in my collection at the moment, like the celesta and the key glockenspiel, but these four instruments are the most well known of all the idiophones. They are also shrouded in mystery in a way.

Many people will confuse these instruments with each other, since they are very similar, so I talk about what makes them different and why each of them indeed are different instruments.