Mode -> Ruleset.

osu.Game/Rulesets/Objects/HitObject.cs

@@ -0,0 +1,52 @@
+// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Game.Audio;
+using osu.Game.Beatmaps.Timing;
+using osu.Game.Database;
+using System.Collections.Generic;
+
+namespace osu.Game.Rulesets.Objects
+{
+    /// <summary>
+    /// A HitObject describes an object in a Beatmap.
+    /// <para>
+    /// HitObjects may contain more properties for which you should be checking through the IHas* types.
+    /// </para>
+    /// </summary>
+    public class HitObject
+    {
+        /// <summary>
+        /// The time at which the HitObject starts.
+        /// </summary>
+        public double StartTime { get; set; }
+
+        /// <summary>
+        /// The samples to be played when this hit object is hit.
+        /// </summary>
+        public List<SampleInfo> Samples = new List<SampleInfo>();
+
+        /// <summary>
+        /// Applies default values to this HitObject.
+        /// </summary>
+        /// <param name="difficulty">The difficulty settings to use.</param>
+        /// <param name="timing">The timing settings to use.</param>
+        public virtual void ApplyDefaults(TimingInfo timing, BeatmapDifficulty difficulty)
+        {
+            ControlPoint overridePoint;
+            ControlPoint timingPoint = timing.TimingPointAt(StartTime, out overridePoint);
+
+            foreach (var sample in Samples)
+            {
+                if (sample.Volume == 0)
+                    sample.Volume = (overridePoint ?? timingPoint)?.SampleVolume ?? 0;
+
+                // If the bank is not assigned a name, assign it from the control point
+                if (!string.IsNullOrEmpty(sample.Bank))
+                    continue;
+
+                sample.Bank = (overridePoint ?? timingPoint)?.SampleBank ?? @"normal";
+            }
+        }
+    }
+}