v0.1.0

Early stage build for easier test out without building from source.

Press Tab key or click the top left circle with current bar number to show the control GUI, can load other tabs from there.

It's possible that switching tabs or display modes might crash the app, need to restart it in this case.

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Note that the Scarborough Fare tab in this version in not correct, it should be in Dorian scale, but the tab treated it as natural minor scale, fixed later.