- rename data type alias to avoid confusion (253a225)
- use shorter message names (66b7c7f)
- add shorthand types for messages (9e0fcb2)
- use more concise naming (d9e3b17)
- add channel filter to the observe function (5f2d1ec)
- add midi message type aliases (26ebaf2)
- use previously read values when building midi note (7c74d7e)
- add note frequency to note message (de9e32e)