InvertPitch.lua

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--! @example "InvertPitch.lua"
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CenterPitch = Knob("Center_Pitch", 60, 0, 127, true)

function onNote(e)
    local center = CenterPitch.value
    local delta = e.note-center
    local note = center - delta
    if note>=0 and note<=127 then
        playNote(note, e.velocity)
    end
end

function onRelease()
    -- eat event
end