This is great fun, congrats!

2 small requests that (I think) would help with the UX: consider moving (or duplicating) the play button - maybe directly in the middle below the editor, or on that panel itself. It took me a few confusing seconds to realise where it was. Also, could you consider making each fourth (or first) column a very slightly lighter grey? So if I want my kick on 1, 3, 10 and 11 it's really easy to see where to click without counting?

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mockingloris 4 days ago | parent | next [-]

> Also, could you consider making each fourth (or first) column a very slightly lighter grey

This could be a component logic; a row of drop downs for customizing the UI and a good examples are color and grid count. This could even be a toml/json config file that can be imported/exported.

My own addition is ability to import samples from my own device.

	▲	chr15m 4 days ago \| parent [-]
		Importing samples is on my TODO list. Thank you for the feedback!

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chr15m 4 days ago | parent | prev [-]

Great ideas, thank you. I will triage these suggestions into the issue tracker. Many thanks!