diff --git a/package-lock.json b/package-lock.json
index cf1c991c..2fc0f202 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -955,7 +955,6 @@
       "os": [
         "aix"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -973,7 +972,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -991,7 +989,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1009,7 +1006,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1027,7 +1023,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1045,7 +1040,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1063,7 +1057,6 @@
       "os": [
         "freebsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1081,7 +1074,6 @@
       "os": [
         "freebsd"
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-      "peer": true,
       "engines": {
         "node": ">=18"
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@@ -1099,7 +1091,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
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@@ -1117,7 +1108,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1135,7 +1125,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1153,7 +1142,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1171,7 +1159,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1189,7 +1176,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1207,7 +1193,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1225,7 +1210,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1243,7 +1227,6 @@
       "os": [
         "linux"
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-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1261,7 +1244,6 @@
       "os": [
         "netbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1279,7 +1261,6 @@
       "os": [
         "netbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1297,7 +1278,6 @@
       "os": [
         "openbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1315,7 +1295,6 @@
       "os": [
         "openbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1333,7 +1312,6 @@
       "os": [
         "openharmony"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1351,7 +1329,6 @@
       "os": [
         "sunos"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1369,7 +1346,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1387,7 +1363,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -1405,7 +1380,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
diff --git a/services/analysis-engine/src/bandscope_analysis/chords/section_harmony.py b/services/analysis-engine/src/bandscope_analysis/chords/section_harmony.py
index a61a7d00..1d98c3f6 100644
--- a/services/analysis-engine/src/bandscope_analysis/chords/section_harmony.py
+++ b/services/analysis-engine/src/bandscope_analysis/chords/section_harmony.py
@@ -84,14 +84,17 @@ def _summarize_one_section(
         the portion of their duration that overlaps the window.
     """
     durations: dict[str, float] = {}
-    overlapping_chords: list[str] = []
+    chord_changes = 0
+    previous_chord: str | None = None
 
     for seg_start, seg_end, chord in segments:
         overlap = min(seg_end, section_end) - max(seg_start, section_start)
         if overlap <= 0.0:
             continue
         durations[chord] = durations.get(chord, 0.0) + overlap
-        overlapping_chords.append(chord)
+        if previous_chord is not None and previous_chord != chord:
+            chord_changes += 1
+        previous_chord = chord
 
     chords: list[ChordDuration] = [
         {"chord": chord, "duration": duration}
@@ -104,12 +107,6 @@ def _summarize_one_section(
             main_chord = entry["chord"]
             break
 
-    chord_changes = sum(
-        1
-        for previous, current in zip(overlapping_chords, overlapping_chords[1:], strict=False)
-        if previous != current
-    )
-
     return {
         "start_time": section_start,
         "end_time": section_end,