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> Brackets and s-expressions can be fun, but they can get very unwieldy very quickly in LIL, especially since backslashes are required to break up commands across different lines.

> The previous vibrato example

    sine [add [param 440] [sine 6 50]] 0.5

> can be rewritten without brackets using a special function called 'zz':

    sine 6 50
    add zz 440
    sine zz 0.5

> zz itself doesn't do anything. It is a placeholder that tells the function to use the argument that has been implicitely generated.

This is an interesting approach to making stacked operations more readable, similar to the "thread-as" macro in Clojure [1], which would make the example look like:

    (as-> (sine 6 50) zz
          (add zz 440)
          (sine zz 0.5))

Of course, with this example in Clojure one could use "thread-first":

    (-> (sine 6 50)
        (add 440)
        (sine 0.5))

[1]: https://clojure.org/guides/threading_macros

Incidentally, for making music with Clojure there's Overtone: https://github.com/overtone/overtone