diff --git a/Cavern.QuickEQ.Format/ConfigurationFile/ConfigurationFile.cs b/Cavern.QuickEQ.Format/ConfigurationFile/ConfigurationFile.cs
index b3998e5c..4c4cf331 100644
--- a/Cavern.QuickEQ.Format/ConfigurationFile/ConfigurationFile.cs
+++ b/Cavern.QuickEQ.Format/ConfigurationFile/ConfigurationFile.cs
@@ -52,23 +52,41 @@ protected ConfigurationFile(string name, string[] inputs) {
         }
 
         /// <summary>
-        /// Removes one of the <see cref="SplitPoints"/> by <paramref name="name"/> and clears all the filters it contains.
+        /// Add a new split with a custom <paramref name="name"/> at a specific <paramref name="index"/> of <see cref="SplitPoints"/>.
         /// </summary>
-        /// <exception cref="ArgumentOutOfRangeException">The <paramref name="name"/> was not found
-        /// among the <see cref="SplitPoints"/></exception>
-        /// <exception cref="IndexOutOfRangeException">The last split point can't be removed. To bypass this restriction,
-        /// you could add an empty split point and remove the previous last one.</exception>
-        public void ClearSplitPoint(string name) {
-            int pos = GetSplitPointIndexByName(name);
-            if (pos == SplitPoints.Count - 1) { // Last split can be cleared and replaced with new outputs.
-                FilterGraphNode[] roots = SplitPoints[pos].roots;
+        public void AddSplitPoint(int index, string name) {
+            if (index != SplitPoints.Count) {
+                List<(string name, FilterGraphNode[] roots)> splits = (List<(string, FilterGraphNode[])>)SplitPoints;
+                FilterGraphNode[] start = (FilterGraphNode[])splits[index].roots.Clone();
+                for (int i = 0; i < start.Length; i++) {
+                    ReferenceChannel channel = ((InputChannel)start[i].Filter).Channel;
+                    start[i] = start[i].AddAfterParents(new OutputChannel(channel)).AddAfterParents(new InputChannel(channel));
+                }
+                splits.Insert(index, (name, start));
+            } else {
+                CreateNewSplitPoint(name);
+                FilterGraphNode[] end = SplitPoints[^1].roots;
+                for (int i = 0; i < end.Length; i++) {
+                    ReferenceChannel channel = ((InputChannel)end[i].Filter).Channel;
+                    end[i].AddChild(new OutputChannel(channel));
+                }
+                return;
+            }
+        }
+
+        /// <summary>
+        /// Clears all filters in one of the <see cref="SplitPoints"/> by <paramref name="index"/>.
+        /// </summary>
+        public void ClearSplitPoint(int index) {
+            if (index == SplitPoints.Count - 1) { // Last split can be cleared and replaced with new outputs
+                FilterGraphNode[] roots = SplitPoints[index].roots;
                 for (int i = 0; i < roots.Length; i++) {
                     roots[i].DetachChildren();
                     roots[i].AddChild(new OutputChannel(((InputChannel)roots[i].Filter).Channel));
                 }
             } else { // General case: clear the children and use the next split to fetch the outputs
-                FilterGraphNode[] roots = SplitPoints[pos].roots,
-                    next = SplitPoints[pos + 1].roots;
+                FilterGraphNode[] roots = SplitPoints[index].roots,
+                    next = SplitPoints[index + 1].roots;
                 for (int i = 0; i < roots.Length; i++) {
                     ReferenceChannel channel = ((InputChannel)roots[i].Filter).Channel;
                     FilterGraphNode equivalent = next.First(x => ((InputChannel)x.Filter).Channel == channel);
@@ -81,26 +99,30 @@ public void ClearSplitPoint(string name) {
         }
 
         /// <summary>
-        /// Removes one of the <see cref="SplitPoints"/> by <paramref name="name"/> and clears all the filters it contains.
+        /// Clears all filters in one of the <see cref="SplitPoints"/> by <paramref name="name"/>.
         /// </summary>
         /// <exception cref="ArgumentOutOfRangeException">The <paramref name="name"/> was not found
         /// among the <see cref="SplitPoints"/></exception>
+        public void ClearSplitPoint(string name) => ClearSplitPoint(GetSplitPointIndexByName(name));
+
+        /// <summary>
+        /// Removes one of the <see cref="SplitPoints"/> by <paramref name="index"/> and clears all the filters it contains.
+        /// </summary>
         /// <exception cref="IndexOutOfRangeException">The last split point can't be removed. To bypass this restriction,
         /// you could add an empty split point and remove the previous last one.</exception>
-        public void RemoveSplitPoint(string name) {
+        public void RemoveSplitPoint(int index) {
             if (SplitPoints.Count == 1) {
                 throw new IndexOutOfRangeException();
             }
 
-            int pos = GetSplitPointIndexByName(name);
-            if (pos == SplitPoints.Count - 1) { // Last split can be just removed
-                FilterGraphNode[] roots = SplitPoints[pos].roots;
+            if (index == SplitPoints.Count - 1) { // Last split can be just removed
+                FilterGraphNode[] roots = SplitPoints[index].roots;
                 for (int i = 0; i < roots.Length; i++) {
                     roots[i].DetachFromGraph(false);
                 }
             } else { // General case: transfer children from the next set of roots, then swap roots
-                FilterGraphNode[] roots = SplitPoints[pos].roots,
-                    next = SplitPoints[pos + 1].roots;
+                FilterGraphNode[] roots = SplitPoints[index].roots,
+                    next = SplitPoints[index + 1].roots;
                 for (int i = 0; i < roots.Length; i++) {
                     ReferenceChannel channel = ((InputChannel)roots[i].Filter).Channel;
                     FilterGraphNode equivalent = next.First(x => ((InputChannel)x.Filter).Channel == channel);
@@ -110,11 +132,20 @@ public void RemoveSplitPoint(string name) {
                     equivalent.DetachChildren();
                     roots[i].AddChildren(oldChildren);
                 }
-                ((List<(string, FilterGraphNode[])>)SplitPoints)[pos + 1] = (SplitPoints[pos + 1].name, roots);
+                ((List<(string, FilterGraphNode[])>)SplitPoints)[index + 1] = (SplitPoints[index + 1].name, roots);
             }
-            ((List<(string, FilterGraphNode[])>)SplitPoints).RemoveAt(pos);
+            ((List<(string, FilterGraphNode[])>)SplitPoints).RemoveAt(index);
         }
 
+        /// <summary>
+        /// Removes one of the <see cref="SplitPoints"/> by <paramref name="name"/> and clears all the filters it contains.
+        /// </summary>
+        /// <exception cref="ArgumentOutOfRangeException">The <paramref name="name"/> was not found
+        /// among the <see cref="SplitPoints"/></exception>
+        /// <exception cref="IndexOutOfRangeException">The last split point can't be removed. To bypass this restriction,
+        /// you could add an empty split point and remove the previous last one.</exception>
+        public void RemoveSplitPoint(string name) => RemoveSplitPoint(GetSplitPointIndexByName(name));
+
         /// <summary>
         /// Adds an entry to the <see cref="SplitPoints"/> with the current state of the configuration, creating new
         /// <see cref="InputChannel"/>s after each existing <see cref="OutputChannel"/>.
@@ -123,7 +154,8 @@ public void RemoveSplitPoint(string name) {
         /// because new input nodes are created in this function.</remarks>
         protected void CreateNewSplitPoint(string name) {
             FilterGraphNode[] nodes =
-                FilterGraphNodeUtils.MapGraph(InputChannels.Select(x => x.root)).Where(x => x.Filter is OutputChannel).ToArray();
+                FilterGraphNodeUtils.MapGraph(InputChannels.Select(x => x.root))
+                .Where(x => x.Filter is OutputChannel && x.Children.Count == 0).ToArray();
             for (int i = 0; i < nodes.Length; i++) {
                 nodes[i] = nodes[i].AddChild(new InputChannel(((OutputChannel)nodes[i].Filter).Channel));
             }
diff --git a/Cavern.QuickEQ/Equalization/Equalizer.Transform.cs b/Cavern.QuickEQ/Equalization/Equalizer.Transform.cs
index 0c95db07..7d5023be 100644
--- a/Cavern.QuickEQ/Equalization/Equalizer.Transform.cs
+++ b/Cavern.QuickEQ/Equalization/Equalizer.Transform.cs
@@ -39,6 +39,7 @@ public void AddSlope(double slope, double startFreq, double endFreq) {
 
         /// <summary>
         /// Set this equalizer so if the <paramref name="other"/> is linear, this will be the difference from it.
+        /// This is calculated by LHS (this instance) - RHS (<paramref name="other"/>) for each value.
         /// </summary>
         /// <remarks>Matching frequencies have to be guaranteed before calling this function with
         /// <see cref="HasTheSameFrequenciesAs(Equalizer)"/>.</remarks>
diff --git a/Cavern/Filters/Utilities/FilterGraphNode.cs b/Cavern/Filters/Utilities/FilterGraphNode.cs
index 88b47090..c21e602d 100644
--- a/Cavern/Filters/Utilities/FilterGraphNode.cs
+++ b/Cavern/Filters/Utilities/FilterGraphNode.cs
@@ -43,7 +43,7 @@ public class FilterGraphNode {
         /// Place a <see cref="FilterGraphNode"/> between this and the <see cref="parents"/>.
         /// </summary>
         public void AddAfterParents(FilterGraphNode newParent) {
-            newParent.parents.AddRange(children);
+            newParent.parents.AddRange(parents);
             for (int i = 0, c = parents.Count; i < c; i++) {
                 parents[i].children.Clear();
                 parents[i].children.Add(newParent);
diff --git a/CavernSamples/FilterStudio/Consts/Language.cs b/CavernSamples/FilterStudio/Consts/Language.cs
index 135f85e0..b409ca23 100644
--- a/CavernSamples/FilterStudio/Consts/Language.cs
+++ b/CavernSamples/FilterStudio/Consts/Language.cs
@@ -2,6 +2,8 @@
 using System.Globalization;
 using System.Windows;
 
+using FilterStudio.Windows;
+
 namespace FilterStudio.Consts {
     /// <summary>
     /// Handle fetching of language strings and translations.
@@ -13,9 +15,10 @@ static class Language {
         public static ResourceDictionary GetMainWindowStrings() => mainWindowCache ??= GetFor("MainWindowStrings");
 
         /// <summary>
-        /// Get the translations of dialogs.
+        /// Get the <see cref="ConvolutionLengthDialog"/>'s translation.
         /// </summary>
-        public static ResourceDictionary GetDialogStrings() => dialogCache ??= GetFor("DialogStrings");
+        public static ResourceDictionary GetConvolutionLengthDialogStrings() =>
+            convolutionLengthDialogCache ??= GetFor("ConvolutionLengthDialogStrings");
 
         /// <summary>
         /// Get the translation of a resource file in the user's language, or in English if a translation couldn't be found.
@@ -40,8 +43,8 @@ static ResourceDictionary GetFor(string resource) {
         static ResourceDictionary mainWindowCache;
 
         /// <summary>
-        /// The loaded translation of the dialogs for reuse.
+        /// The loaded translation of the <see cref="ConvolutionLengthDialog"/> for reuse.
         /// </summary>
-        static ResourceDictionary dialogCache;
+        static ResourceDictionary convolutionLengthDialogCache;
     }
 }
\ No newline at end of file
diff --git a/CavernSamples/FilterStudio/Graphs/ManipulatableGraph.cs b/CavernSamples/FilterStudio/Graphs/ManipulatableGraph.cs
index d6f45f00..66e43029 100644
--- a/CavernSamples/FilterStudio/Graphs/ManipulatableGraph.cs
+++ b/CavernSamples/FilterStudio/Graphs/ManipulatableGraph.cs
@@ -93,6 +93,11 @@ public void SelectNode(string uid) {
                 return;
             }
 
+            foreach (Node other in Graph.Nodes) {
+                if (other.Attr.LineWidth != 1) {
+                    other.Attr.LineWidth = 1;
+                }
+            }
             node.Attr.LineWidth = 2;
             Dispatcher.BeginInvoke(() => { // Call after the graph was redrawn
                 OnLeftClick?.Invoke(node);
diff --git a/CavernSamples/FilterStudio/Graphs/PipelineEditor.cs b/CavernSamples/FilterStudio/Graphs/PipelineEditor.cs
index 71c21789..a516b50b 100644
--- a/CavernSamples/FilterStudio/Graphs/PipelineEditor.cs
+++ b/CavernSamples/FilterStudio/Graphs/PipelineEditor.cs
@@ -40,7 +40,7 @@ public ConfigurationFile Source {
             set {
                 source = value;
                 RecreateGraph();
-                SelectNode(source.SplitPoints[0].roots.GetHashCode().ToString());
+                SelectNode("0");
                 OnSplitChanged?.Invoke(source.SplitPoints[0].roots);
             }
         }
@@ -62,16 +62,16 @@ void RecreateGraph() {
             graph.Attr.BackgroundColor = background;
             graph.Attr.LayerDirection = LayerDirection.LR;
 
-            string lastUid = "a";
+            string lastUid = inNodeUid;
             graph.AddNode(new StyledNode(lastUid, (string)language["NInpu"]));
             for (int i = 0, c = splits.Count; i < c; i++) {
-                string newUid = splits[i].roots.GetHashCode().ToString();
+                string newUid = i.ToString();
                 graph.AddNode(new StyledNode(newUid, splits[i].name));
                 new StyledEdge(graph, lastUid, newUid);
                 lastUid = newUid;
             }
-            graph.AddNode(new StyledNode("b", (string)language["NOutp"]));
-            new StyledEdge(graph, lastUid, "b");
+            graph.AddNode(new StyledNode(outNodeUid, (string)language["NOutp"]));
+            new StyledEdge(graph, lastUid, outNodeUid);
             Graph = graph;
         }
 
@@ -83,10 +83,20 @@ void LeftClick(object element) {
                 return;
             }
 
-            if (int.TryParse(node.Id, out int rootCode)) {
-                (string _, FilterGraphNode[] roots) = source.SplitPoints.FirstOrDefault(x => x.roots.GetHashCode() == rootCode);
+            if (int.TryParse(node.Id, out int root)) {
+                (string _, FilterGraphNode[] roots) = source.SplitPoints[root];
                 OnSplitChanged?.Invoke(roots);
             }
         }
+
+        /// <summary>
+        /// UID of the node that represents the filter set input.
+        /// </summary>
+        internal const string inNodeUid = "in";
+
+        /// <summary>
+        /// UID of the node that represents the filter set output.
+        /// </summary>
+        internal const string outNodeUid = "out";
     }
 }
\ No newline at end of file
diff --git a/CavernSamples/FilterStudio/MainWindow.Graph.cs b/CavernSamples/FilterStudio/MainWindow.Graph.cs
index 7ad503ad..ec733f5a 100644
--- a/CavernSamples/FilterStudio/MainWindow.Graph.cs
+++ b/CavernSamples/FilterStudio/MainWindow.Graph.cs
@@ -61,9 +61,14 @@ void SetDirection(LayerDirection direction) {
         /// Converts all filters to convolutions and merges them downwards if they only have a single child.
         /// </summary>
         void ConvertToConvolution(object _, RoutedEventArgs e) {
+            if (pipeline.Source == null) {
+                Error((string)language["NoCon"]);
+                return;
+            }
+
             ConvolutionLengthDialog length = new();
             if (length.ShowDialog().Value) {
-                FilterGraphNodeUtils.ConvertToConvolution(rootNodes, length.Size);
+                FilterGraphNodeUtils.ConvertToConvolution(pipeline.Source.SplitPoints[0].roots, length.Size);
                 ReloadGraph();
             }
         }
diff --git a/CavernSamples/FilterStudio/MainWindow.Pipeline.cs b/CavernSamples/FilterStudio/MainWindow.Pipeline.cs
index c419b387..cccdb9c3 100644
--- a/CavernSamples/FilterStudio/MainWindow.Pipeline.cs
+++ b/CavernSamples/FilterStudio/MainWindow.Pipeline.cs
@@ -10,6 +10,30 @@
 namespace FilterStudio {
     // Handlers of the pipeline graph control
     partial class MainWindow {
+        /// <summary>
+        /// Add a new empty pipeline step after the selected node.
+        /// </summary>
+        void AddStep(object sender, RoutedEventArgs e) {
+            StyledNode node = pipeline.GetSelectedNode(sender);
+            if (node == null) {
+                Error((string)language["NPNod"]);
+                return;
+            }
+
+            if (!int.TryParse(node.Id, out int uid)) {
+                if (node.Id == PipelineEditor.inNodeUid) {
+                    Error((string)language["NPNod"]);
+                    return;
+                } else {
+                    uid = pipeline.Source.SplitPoints.Count;
+                }
+            }
+
+            pipeline.Source.AddSplitPoint(uid, (string)language["NSNew"]);
+            pipeline.Source = pipeline.Source; // Force a reload of the pipeline graph
+            pipeline.SelectNode(uid.ToString()); // Force a reload of the filter graph on the new step
+        }
+
         /// <summary>
         /// Clear the currently selected pipeline step (remove all its filters).
         /// </summary>
@@ -20,9 +44,9 @@ void ClearStep(object sender, RoutedEventArgs e) {
                 return;
             }
 
-            try {
-                pipeline.Source.ClearSplitPoint(node.LabelText);
-            } catch (ArgumentOutOfRangeException) {
+            if (int.TryParse(node.Id, out int uid)) {
+                pipeline.Source.ClearSplitPoint(uid);
+            } else {
                 Error((string)language["NPiSi"]);
                 return;
             }
@@ -57,17 +81,16 @@ void DeleteStep(object sender, RoutedEventArgs e) {
         /// Handle right-clicking on a pipeline <paramref name="element"/>.
         /// </summary>
         void PipelineRightClick(object element) {
-            if (element is not Node && element is not Edge) {
+            if (element is not Node) {
                 return;
             }
 
             List<(string, Action<object, RoutedEventArgs>)> menuItems = [
+                ((string)language["OpAdP"], (_, e) => AddStep(element, e)),
+                (null, null), // Separator for deletion
+                ((string)language["CoCle"], (_, e) => ClearStep(element, e)),
+                ((string)language["CoDel"], (_, e) => DeleteStep(element, e))
             ];
-            if (element is Node) {
-                menuItems.Add((null, null)); // Separator for deletion
-                menuItems.Add(((string)language["CoCle"], (_, e) => ClearStep(element, e)));
-                menuItems.Add(((string)language["CoDel"], (_, e) => DeleteStep(element, e)));
-            }
             QuickContextMenu.Show(menuItems);
         }
     }
diff --git a/CavernSamples/FilterStudio/MainWindow.xaml b/CavernSamples/FilterStudio/MainWindow.xaml
index 192d7cfa..22310384 100644
--- a/CavernSamples/FilterStudio/MainWindow.xaml
+++ b/CavernSamples/FilterStudio/MainWindow.xaml
@@ -33,6 +33,7 @@
                 <MenuItem Header="{StaticResource OpDel}" Click="DeleteNode"/>
             </MenuItem>
             <MenuItem Header="{StaticResource MPipe}" Style="{StaticResource RootMenuItem}">
+                <MenuItem Header="{StaticResource OpAdP}" Click="AddStep"/>
                 <Separator/>
                 <MenuItem Header="{StaticResource OpCle}" Click="ClearStep"/>
                 <MenuItem Header="{StaticResource OpDeP}" Click="DeleteStep"/>