--- a/dom/media/webaudio/AudioEventTimeline.h
+++ b/dom/media/webaudio/AudioEventTimeline.h
@@ -454,18 +454,18 @@ public:
 
         previous = next;
         next = &mEvents[lastEventId];
         if (aTime < mEvents[lastEventId].template Time<TimeType>()) {
           bailOut = true;
         }
       }
 
-      // The time was found in the list of events.
       if (!bailOut && lastEventId < mEvents.Length()) {
+        // The time matches one of the events exactly.
         MOZ_ASSERT(TimesEqual(aTime, mEvents[lastEventId].template Time<TimeType>()));
 
         // SetTarget nodes can be handled no matter what their next node is (if they have one)
         if (mEvents[lastEventId].mType == AudioTimelineEvent::SetTarget) {
           // Follow the curve, without regard to the next event, starting at
           // the last value of the last event.
           aBuffer[bufferIndex] = ExponentialApproach(mEvents[lastEventId].template Time<TimeType>(),
                                                   mLastComputedValue, mEvents[lastEventId].mValue,