diff --git a/source/index.rst b/source/index.rst
index 12f02a9..5490da6 100644
--- a/source/index.rst
+++ b/source/index.rst
@@ -56,6 +56,13 @@ Welcome to ScienceNotes's documentation!
 
    ml/nn.rst
 
+.. toctree::
+   :maxdepth: 2
+   :numbered:
+   :caption: Théorie Musicale
+
+   music/harmoniques.rst
+
 Indices and tables
 ==================
 
diff --git a/source/music/harmoniques.rst b/source/music/harmoniques.rst
new file mode 100644
index 0000000..f7fe29a
--- /dev/null
+++ b/source/music/harmoniques.rst
@@ -0,0 +1,7 @@
+Harmoniques
+================================
+
+game pythagoritienne
+game tempéré
+
+