Finished Version 1.0. Guide for installation will be available soon

gui/filechooser.kv

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+FileChooserScreen:
+    name: "ChooseFile"
+    md_bg_color: (0, 0, 0, 1)
+    BoxLayout:
+        size: root.size
+        pos: root.pos
+        orientation: "vertical"
+        FileChooserListView:
+            id: filechooser
+
+        BoxLayout:
+            size_hint_y: None
+            height: 30
+            Button:
+                text: "Cancel"
+                on_release:
+                    app.root.current = "Home"
+                    root.manager.transition.direction = "right"
+
+            Button:
+                text: "Load"
+                on_release: root.load(filechooser.path, filechooser.selection)

gui/gui.kv

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+HomeScreen:
+    name: "Home"
+    md_bg_color: app.theme_cls.accent_color
+    GridLayout:
+        cols:1
+        Label:
+            text: "MIDI to Micro:bit Sound converter"
+            font_size: 30
+            bold: True
+            italic: True
+            color: (50, 50, 255, 1)
+        Label:
+            id: infobox
+            text: "Output will be automatically added to your clipboard once you have selected a file"
+        Button:
+            text: "choose file to start"
+            background_color: app.theme_cls.primary_color
+            on_release:
+                app.root.current = "ChooseFile"
+                root.manager.transition.direction = "left"

gui/loading_screen.kv

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+TrackChooseScreen:
+    name: "Track"
+    md_bg_color: app.theme_cls.accent_color
+    GridLayout:
+        cols:1
+        Label:
+            text: "Track selection"
+            font_size: 30
+            bold: True
+            italic: True
+            color: (50, 50, 255, 1)
+        FloatLayout:
+            Spinner:
+                id: track_spinner
+                size_hint: 0.7, 0.2
+                pos_hint: {"x": 0.15, "y":0.5}
+                background_color: (0, 0, 0, 1)
+                text: "Select a track"
+                values: ["Test"]
+        Button:
+            text: "confirm"
+            background_color: app.theme_cls.primary_color
+            on_release:
+                root.extract()