Remove rounding of slider velocity (when applied as scroll speed)

osu.Game/Beatmaps/ControlPoints/EffectControlPoint.cs

@@ -21,7 +21,6 @@ public class EffectControlPoint : ControlPoint, IEquatable<EffectControlPoint>
         /// </summary>
         public readonly BindableDouble ScrollSpeedBindable = new BindableDouble(1)
         {
-            Precision = 0.01,
             MinValue = 0.01,
             MaxValue = 10
         };

osu.Game/Screens/Edit/Timing/EffectSection.cs

@@ -52,17 +52,38 @@ void saveChanges()
 
         protected override void OnControlPointChanged(ValueChangedEvent<EffectControlPoint?> point)
         {
-            if (point.NewValue != null)
+            scrollSpeedSlider.Current.ValueChanged -= updateControlPointFromSlider;
+
+            if (point.NewValue is EffectControlPoint newEffectPoint)
             {
                 isRebinding = true;
 
-                kiai.Current = point.NewValue.KiaiModeBindable;
-                scrollSpeedSlider.Current = point.NewValue.ScrollSpeedBindable;
+                kiai.Current = newEffectPoint.KiaiModeBindable;
+                scrollSpeedSlider.Current = new BindableDouble
+                {
+                    MinValue = 0.01,
+                    MaxValue = 10,
+                    Precision = 0.01,
+                    Value = newEffectPoint.ScrollSpeedBindable.Value
+                };
+                scrollSpeedSlider.Current.ValueChanged += updateControlPointFromSlider;
+                // at this point in time the above is enough to keep the slider control in sync with reality,
+                // since undo/redo causes `OnControlPointChanged()` to fire.
+                // whenever that stops being the case, or there is a possibility that the scroll speed could be changed
+                // by something else other than this control, this code should probably be revisited to have a binding in the other direction, too.
 
                 isRebinding = false;
             }
         }
 
+        private void updateControlPointFromSlider(ValueChangedEvent<double> scrollSpeed)
+        {
+            if (ControlPoint.Value is not EffectControlPoint effectPoint || isRebinding)
+                return;
+
+            effectPoint.ScrollSpeedBindable.Value = scrollSpeed.NewValue;
+        }
+
         protected override EffectControlPoint CreatePoint()
         {
             var reference = Beatmap.ControlPointInfo.EffectPointAt(SelectedGroup.Value.Time);