The Middle Ages is from the year 500-1450. That's a long time! People couldn't move around and share ideas as easily as they can now, so things stayed the same and knowledge was passed from one generation to the next. Most of the instruments were easy to carry because traveling musicians moved from village to village.
Here are some of the musical instruments used in the Middle Ages. Notice that many come in different sizes, and some are still used today!
So what do these instrument sound like? Click on the picture below to link to the Iowa State webpage. They have recordings of (almost) every instrument. Have fun exploring!