### notes

An expression that evaluates to a text string that is also a sequence of notes.

Each word of the string is a separate note. Each note has a name and an optional accidental, octave, and duration. For example:

```
"c#4q" -- single note
"c d e f g a b c5"
"f#5w c#3e a#4w"
"cq f. fe fw"
```