(Before I decide to use speccy as my project target, I chose mutateful and ossia score. However, mutateful is a tool based on a paid, powerful but complex platform called Ableton live. As for Ossia Score, it says its free and open source, while it asks you to pay 60 dollars only if you want to download it on Windows.)

Speccy actually doesn’t have fancy main pages. It is a live-coding tool made by Chris McCormick, who seems interested in making games and code-generated music. According to the simple documentation and a short demo video, it doesn’t have complex functions, but things like

(sfxr {:wave :square
:note #(sq %
[36 -- -- 41]})

to adjust when and in what pitch the digital note will occur.

However, that doesn’t mean the tool is useless. The tool is bonded with another tool made by the author called jsfxr, to make 8-bit sounds and generate SFX. You can easily access it to get some prefabbed sound effects like coin or jump sound, or you can adjust the parameters to have the different sound effects you want.

Then, you can copy the code and paste it into Speccy like this:

(sfxr "34T6PkkdhYScrqtSBs7EnnHxtsiK5rE3a6XYDzVCHzSRDHzeKdFEkb7TSv3P3LrU7RpFpZkU79JLPfBM7yFg1aTfZdTdPR4aNvnVFWY6vqdHTKeyv8nSYpDgF"
{:note #(at % 16 {0 5 1 27 8 24 14 99})})

And you can make this sound you made just now to occur in your live coding at a certain time and in certain pitches. And you can adjust it with some other parameters too.

Then I will show you what I randomly made with the two tools, hope you can enjoy it. (I’m not using magic but using the clipboard to paste the codes!)