diff --git a/layer/NoteDelimiters.cpp b/layer/NoteDelimiters.cpp
new file mode 100644
index 0000000..a9fddf8
--- /dev/null
+++ b/layer/NoteDelimiters.cpp
@@ -0,0 +1,51 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "NoteDelimiters.h"
+
+#include <QPainter>
+
+#include <cmath>
+
+#include "base/Pitch.h"
+
+#include "LayerGeometryProvider.h"
+
+#include <iostream>
+using namespace std;
+
+void NoteDelimiters::paintDelimitersVertical
+    (LayerGeometryProvider *v, QPainter &paint, QRect r,
+    double minf, double maxf)
+{
+    int x0 = r.x(), y0 = r.y(), x1 = r.x() + r.width(), y1 = r.y() + r.height();
+
+    int py = y1;
+    paint.setPen(Qt::gray);
+
+    for (int i = 0; i < 128; ++i) {
+
+        double f = Pitch::getFrequencyForPitch(i);
+        int y = int(lrint(v->getYForFrequency(f, minf, maxf, true)));
+
+        if (y < y0 - 2) break;
+        if (y > y1 + 2) {
+            continue;
+        }
+
+        paint.drawLine(x0, (y + py) / 2, x1, (y + py) / 2);
+
+        py = y;
+    }
+}
\ No newline at end of file
diff --git a/layer/NoteDelimiters.h b/layer/NoteDelimiters.h
new file mode 100644
index 0000000..3b6eafd
--- /dev/null
+++ b/layer/NoteDelimiters.h
@@ -0,0 +1,30 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef SV_NOTE_DELIMITERS_H
+#define SV_NOTE_DELIMITERS_H
+
+#include <QRect>
+
+class LayerGeometryProvider;
+class QPainter;
+
+class NoteDelimiters {
+public: 
+    void paintDelimitersVertical
+    (LayerGeometryProvider* v, QPainter& paint, QRect rect,
+        double minf, double maxf);
+};
+
+#endif
\ No newline at end of file
diff --git a/layer/SpectrogramLayer.cpp b/layer/SpectrogramLayer.cpp
index 4d57823..0b23f62 100644
--- a/layer/SpectrogramLayer.cpp
+++ b/layer/SpectrogramLayer.cpp
@@ -32,6 +32,7 @@
 
 #include "ColourMapper.h"
 #include "PianoScale.h"
+#include "NoteDelimiters.h"
 #include "PaintAssistant.h"
 #include "Colour3DPlotRenderer.h"
 #include "Colour3DPlotExporter.h"
@@ -84,7 +85,8 @@ SpectrogramLayer::SpectrogramLayer(Configuration config) :
     m_synchronous(false),
     m_haveDetailedScale(false),
     m_exiting(false),
-    m_peakCacheDivisor(8)
+    m_peakCacheDivisor(8),
+    m_delimiters(false)
 {
     QString colourConfigName = "spectrogram-colour";
     int colourConfigDefault = int(ColourMapper::Green);
@@ -2208,7 +2210,7 @@ SpectrogramLayer::paintVerticalScale(LayerGeometryProvider *v, bool detailed,
 
     //!!! cache this?
     
-    int h = rect.height(), w = rect.width();
+    int h = rect.height(), w = this->getVerticalScaleWidth(v, detailed, paint);
     int textHeight = paint.fontMetrics().height();
 
     if (detailed && (h > textHeight * 3 + 10)) {
@@ -2276,9 +2278,17 @@ SpectrogramLayer::paintVerticalScale(LayerGeometryProvider *v, bool detailed,
 
         // piano keyboard
 
+        auto m_scaleWidth = this->getVerticalScaleWidth
+            (v, detailed, paint);
         PianoScale().paintPianoVertical
-            (v, paint, QRect(w - pkw - 1, 0, pkw, h),
-             getEffectiveMinFrequency(), getEffectiveMaxFrequency());
+            (v, paint, QRect(m_scaleWidth - pkw - 1, 0, pkw, h),
+                getEffectiveMinFrequency(), getEffectiveMaxFrequency());
+
+        if (m_delimiters) {
+            NoteDelimiters().paintDelimitersVertical
+                (v, paint, QRect(m_scaleWidth, 0, rect.width(), h),
+                    getEffectiveMinFrequency(), getEffectiveMaxFrequency());
+        }
     }
 
     m_haveDetailedScale = detailed;
diff --git a/layer/SpectrogramLayer.h b/layer/SpectrogramLayer.h
index 2dde353..2f76b6b 100644
--- a/layer/SpectrogramLayer.h
+++ b/layer/SpectrogramLayer.h
@@ -292,6 +292,7 @@ protected slots:
     bool                m_normalizeVisibleArea;
     int                 m_lastEmittedZoomStep;
     bool                m_synchronous;
+    bool                m_delimiters;
 
     mutable bool        m_haveDetailedScale;