diff --git a/src/grid.rs b/src/grid.rs
index 746fc8c..395c27a 100644
--- a/src/grid.rs
+++ b/src/grid.rs
@@ -1,7 +1,8 @@
 use std::ops::RangeInclusive;
 use eframe::egui;
-use eframe::egui::{Color32, Context, Id, PointerButton, Pos2, Rangef, Sense, Ui, Vec2, Widget};
+use eframe::egui::{Color32, Context, Id, PointerButton, Pos2, Rangef, RichText, Sense, Ui, Vec2, Widget};
 use crate::noise::NoteType;
+use crate::scale::Scale;
 use crate::tenori::LOOP_LENGTH;
 
 impl NoteType {
@@ -20,6 +21,7 @@ pub struct Grid {
     pub note_type: NoteType,
     pub volume: f32,
     pub length: u64,
+    scale: Scale,
     notes: Vec<bool>,
     id: String
 }
@@ -30,6 +32,7 @@ impl Grid {
             note_type,
             volume: 1.0,
             length: 250,
+            scale: Scale::CMajor,
             notes: vec![false; (LOOP_LENGTH * LOOP_LENGTH) as usize],
             id: format!("Track {}", counter)
         }
@@ -44,10 +47,19 @@ impl Grid {
                 }
 
                 ui.menu_button("Scale...", |ui| {
-                    ui.button("C Major");
-                    ui.button("C Minor");
-                    ui.button("Chromatic");
-                    ui.button("Pentatonic");
+                    if ui.button(Scale::CMajor.label_text(self.scale)).clicked() {
+                        self.scale = Scale::CMajor
+                    }
+                    if ui.button(Scale::CMinor.label_text(self.scale)).clicked() {
+                        self.scale = Scale::CMinor
+                    }
+                    if ui.button(Scale::Chromatic.label_text(self.scale)).clicked() {
+                        self.scale = Scale::Chromatic
+                    }
+                    if ui.button(Scale::Pentatonic.label_text(self.scale)).clicked() {
+                        self.scale = Scale::Pentatonic
+                    }
+
                 })
             });
 
@@ -102,11 +114,12 @@ impl Grid {
         }
     }
 
-    pub fn notes(&self, beat: u32) -> Vec<u32> {
+    pub fn notes(&self, beat: u32) -> Vec<i32> {
         let mut notes = vec![];
         for y in 0..LOOP_LENGTH {
             if self.notes[(y * LOOP_LENGTH + beat) as usize] {
-                notes.push(LOOP_LENGTH - y)
+                let row = LOOP_LENGTH - y - 1;
+                notes.push(self.scale.tone(row))
             }
         }
         notes
diff --git a/src/main.rs b/src/main.rs
index e8ce426..382c405 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,7 @@ mod gui;
 mod tenori;
 mod grid;
 mod noise;
+mod scale;
 
 use std::time::Duration;
 use eframe::{App, Frame};
diff --git a/src/scale.rs b/src/scale.rs
new file mode 100644
index 0000000..cc9a483
--- /dev/null
+++ b/src/scale.rs
@@ -0,0 +1,40 @@
+use eframe::egui::RichText;
+
+#[derive(Copy, Clone, Debug, PartialEq)]
+pub enum Scale {
+    CMajor,
+    CMinor,
+    Chromatic,
+    Pentatonic
+}
+
+impl Scale {
+    pub fn label_text(self, other: Scale) -> RichText {
+        let selected = other == self;
+        let s = match self {
+            Scale::CMajor => "C Major",
+            Scale::CMinor => "C Minor",
+            Scale::Chromatic => "Chromatic",
+            Scale::Pentatonic => "Pentatonic",
+        };
+
+        let r = RichText::new(s);
+        if selected { r.strong() } else { r }
+    }
+
+    pub fn tone(self, row: u32) -> i32 {
+        let row = row as usize;
+        let tones = match self {
+            Scale::CMajor => [-9, -7, -5, -4, -2, 0, 2, 3, 5, 7, 8, 10, 12, 14, 15, 17],
+            Scale::CMinor => [-9, -7, -6, -4, -2, -1, 1, 3, 5, 6, 8, 10, 11, 13, 15, 17],
+            Scale::Chromatic => [-9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6],
+            Scale::Pentatonic => [-9, -7, -5, -2, 0, 3, 5, 7, 10, 12, 15, 17, 19, 22, 24, 27]
+        };
+
+        if row >= tones.len() {
+            0
+        } else {
+            tones[row]
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/tenori.rs b/src/tenori.rs
index 76e23e3..4357ebb 100644
--- a/src/tenori.rs
+++ b/src/tenori.rs
@@ -90,8 +90,7 @@ impl Tenori {
         let beat = self.beat();
 
         for grid in self.grids.iter() {
-            for note in grid.notes(beat).into_iter() {
-                let tone: i32 = note as i32 - 8;
+            for tone in grid.notes(beat).into_iter() {
 
                 notes.push(Note {
                     note_type: grid.note_type,