diff --git a/ear-production-suite-plugins/plugins/hoa/src/hoa_component.hpp b/ear-production-suite-plugins/plugins/hoa/src/hoa_component.hpp
index 72e91c449..c500c8649 100644
--- a/ear-production-suite-plugins/plugins/hoa/src/hoa_component.hpp
+++ b/ear-production-suite-plugins/plugins/hoa/src/hoa_component.hpp
@@ -2,6 +2,7 @@
 
 #include "JuceHeader.h"
 
+#include "components/look_and_feel/tooltips.hpp"
 #include "components/onboarding.hpp"
 #include "components/overlay.hpp"
 #include "helper/properties_file.hpp"
@@ -32,6 +33,9 @@ class HoaComponent : public Component,
             std::make_unique<InterProcessLock>("EPS_preferences")),
         propertiesFile(getPropertiesFile(propertiesFileLock.get())) {
 
+    tooltipWindow.setLookAndFeel(&tooltipLookAndFeel);
+    tooltipWindow.setOpaque(false);
+
     header->setName("EarHeader (HoaComponent::header)");
     onBoardingButton->setName("EarButton (HoaComponent::onBoardingButton)");
     onBoardingOverlay->setName("Overlay (HoaComponent::onBoardingOverlay)");
@@ -65,6 +69,7 @@ class HoaComponent : public Component,
     addAndMakeVisible(onBoardingButton.get());
     addChildComponent(onBoardingOverlay.get());
 
+    mainValueBox->showRoutingTooltip(p->getNumDawChannels() < 128);
     addAndMakeVisible(mainValueBox.get());
     addAndMakeVisible(orderDisplayValueBox.get());
 
@@ -128,6 +133,10 @@ class HoaComponent : public Component,
 
  private:
   HoaAudioProcessor* p_;
+
+  TooltipWindow tooltipWindow{this};
+  TooltipLookAndFeel tooltipLookAndFeel;
+
   JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(HoaComponent)
 };
 
diff --git a/ear-production-suite-plugins/plugins/hoa/src/value_box_main.hpp b/ear-production-suite-plugins/plugins/hoa/src/value_box_main.hpp
index fea2a9f10..b5a8640c5 100644
--- a/ear-production-suite-plugins/plugins/hoa/src/value_box_main.hpp
+++ b/ear-production-suite-plugins/plugins/hoa/src/value_box_main.hpp
@@ -19,6 +19,7 @@ class ValueBoxMain : public Component {
         hoaTypeLabel_(std::make_unique<Label>()),
         hoaTypeComboBox_(std::make_shared<EarComboBox>()),
         routingLabel_(std::make_unique<Label>()),
+        routingInfoIcon_(std::make_unique<ImageComponent>()),
         routingComboBox_(std::make_shared<EarComboBox>()) {
 
     colourComboBox_->setName("EarComboBox (ValueBoxMain::colourComboBox_)");
@@ -45,6 +46,16 @@ class ValueBoxMain : public Component {
     routingLabel_->setJustificationType(Justification::right);
     addAndMakeVisible(routingLabel_.get());
 
+    routingInfoIcon_->setImage(ImageFileFormat::loadFrom(
+        binary_data::infologo_png, binary_data::infologo_pngSize));
+    routingInfoIcon_->setImagePlacement(RectanglePlacement::centred +
+                                        RectanglePlacement::doNotResize);
+    routingInfoIcon_->setAlpha(0.8);
+    routingInfoIcon_->setMouseCursor(MouseCursor::PointingHandCursor);
+    routingInfoIcon_->setTooltip(
+        "128 channel support requires REAPER v7 or later.");
+    addChildComponent(routingInfoIcon_.get());
+
     routingComboBox_->setDefaultText("Select Scene channel range");
     addAndMakeVisible(routingComboBox_.get());
 
@@ -108,13 +119,22 @@ class ValueBoxMain : public Component {
 
     auto routingArea = area.removeFromTop(rowHeight_);
     auto routingLabelArea = routingArea.withWidth(labelWidth_);
+    routingLabel_->setBounds(routingLabelArea);
+    if (routingInfoIcon_->isVisible()) {
+      auto routingInfoArea = routingArea.removeFromRight(13).withTrimmedTop(1);  // Trimming 1 to get an odd height. Icon is odd height too, so ensures an integer number of pixels padding top and bottom to avoid blurring through anti-aliasing.
+      routingInfoIcon_->setBounds(routingInfoArea);
+      routingArea.removeFromRight(marginSmall_);
+    }
     auto routingComboBoxArea =
         routingArea.withTrimmedLeft(labelWidth_ + marginBig_)
             .reduced(0, marginSmall_);
-    routingLabel_->setBounds(routingLabelArea);
     routingComboBox_->setBounds(routingComboBoxArea);
   }
 
+  void showRoutingTooltip(bool visible) {
+    routingInfoIcon_->setVisible(visible);
+  }
+
   std::shared_ptr<EarNameTextEditor> getNameTextEditor() { return name_; }
   std::shared_ptr<EarComboBox> getRoutingComboBox() { return routingComboBox_; }
   std::shared_ptr<EarComboBox> getColourComboBox() { return colourComboBox_; }
@@ -136,6 +156,7 @@ class ValueBoxMain : public Component {
 
   std::unique_ptr<Label> routingLabel_;
   std::shared_ptr<EarComboBox> routingComboBox_;
+  std::shared_ptr<ImageComponent> routingInfoIcon_;
 
   JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(ValueBoxMain)
 };
diff --git a/shared/components/look_and_feel/tooltips.hpp b/shared/components/look_and_feel/tooltips.hpp
index 423338fed..5124d3958 100644
--- a/shared/components/look_and_feel/tooltips.hpp
+++ b/shared/components/look_and_feel/tooltips.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "JuceHeader.h"
+#include "colours.hpp"
 
 namespace ear {
 namespace plugin {