diff --git a/tests/ableton-automation.test.ts b/tests/ableton-automation.test.ts
index a773b16..e04c8cc 100644
--- a/tests/ableton-automation.test.ts
+++ b/tests/ableton-automation.test.ts
@@ -125,6 +125,26 @@ test('does not create Session envelopes without recorded parameter events', () =
   assert.deepEqual(envelopes, []);
 });
 
+test('canonicalizes an effectively-open filter base before automation starts', () => {
+  const filterOccurrence = {
+    ...occurrence,
+    faderParams: {
+      ...occurrence.faderParams,
+      [FaderParam.LPF]: 0.9996299743652344,
+    },
+    faderAutomation: [{ parameter: FaderParam.LPF, position: 96, value: 0.5, flags: 0 }],
+  };
+  const envelopes = buildClipEnvelopes(
+    filterOccurrence,
+    { [FaderParam.LPF]: [{ session: 23000 }] },
+    track,
+    false,
+  );
+
+  assert.equal(envelopes[0].Automation.Events.FloatEvent[0]['@Value'], 123.5);
+  assert.equal(envelopes[0].Automation.Events.FloatEvent[1]['@Value'], 123.5);
+});
+
 test('keeps research-only group parameters out of Live target envelopes', () => {
   const researchOccurrence = {
     ...occurrence,