#4219 some small project tweaks

Content.Server/Sound/Components/BaseEmitSoundComponent.cs

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+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.Sound.Components
+{
+    /// <summary>
+    /// Base sound emitter which defines most of the data fields.
+    /// Default behavior is to first try to play the sound collection,
+    /// and if one isn't assigned, then try to play the single sound.
+    /// </summary>
+    public abstract class BaseEmitSoundComponent : Component
+    {
+        [ViewVariables(VVAccess.ReadWrite)] [DataField("sound")] public string? SoundName { get; set; } = default!;
+        [ViewVariables(VVAccess.ReadWrite)] [DataField("variation")] public float PitchVariation { get; set; } = 0.0f;
+        [ViewVariables(VVAccess.ReadWrite)] [DataField("soundCollection")] public string? SoundCollectionName { get; set; } = default!;
+    }
+}

Content.Server/Sound/Components/EmitSoundOnActivateComponent.cs

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+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Sound.Components
+{
+    /// <summary>
+    /// Simple sound emitter that emits sound on ActivateInWorld
+    /// </summary>
+    [RegisterComponent]
+    public class EmitSoundOnActivateComponent : BaseEmitSoundComponent
+    {
+        /// <inheritdoc />
+        public override string Name => "EmitSoundOnActivate";
+    }
+}

Content.Server/Sound/Components/EmitSoundOnLandComponent.cs

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+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Sound.Components
+{
+    /// <summary>
+    /// Simple sound emitter that emits sound on LandEvent
+    /// </summary>
+    [RegisterComponent]
+    public class EmitSoundOnLandComponent : BaseEmitSoundComponent
+    {
+        /// <inheritdoc />
+        public override string Name => "EmitSoundOnLand";
+    }
+}

Content.Server/Sound/Components/LoopingLoopingSoundComponent.cs

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+using Content.Shared.Sound;
+using Robust.Shared.Audio;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Network;
+
+namespace Content.Server.Sound.Components
+{
+    [RegisterComponent]
+    public class LoopingLoopingSoundComponent : SharedLoopingSoundComponent
+    {
+        /// <summary>
+        /// Stops all sounds.
+        /// </summary>
+        /// <param name="channel">User that will be affected.</param>
+        public void StopAllSounds(INetChannel? channel)
+        {
+            SendNetworkMessage(new StopAllSoundsMessage(), channel);
+        }
+
+        /// <summary>
+        /// Stops a certain scheduled sound from playing.
+        /// </summary>
+        /// <param name="channel">User that will be affected.</param>
+        public void StopScheduledSound(string filename, INetChannel? channel)
+        {
+            SendNetworkMessage(new StopSoundScheduleMessage() {Filename = filename}, channel);
+        }
+
+        /// <summary>
+        /// Adds an scheduled sound to be played.
+        /// </summary>
+        /// <param name="channel">User that will be affected.</param>
+        public void AddScheduledSound(ScheduledSound schedule, INetChannel? channel)
+        {
+            SendNetworkMessage(new ScheduledSoundMessage() {Schedule = schedule}, channel);
+        }
+
+        public override void StopAllSounds()
+        {
+            StopAllSounds(null);
+        }
+
+        public override void StopScheduledSound(string filename)
+        {
+            StopScheduledSound(filename, null);
+        }
+
+        public override void AddScheduledSound(ScheduledSound schedule)
+        {
+            AddScheduledSound(schedule, null);
+        }
+
+        /// <summary>
+        ///     Play an audio file following the entity.
+        /// </summary>
+        /// <param name="filename">The resource path to the OGG Vorbis file to play.</param>
+        /// <param name="channel">User that will be affected.</param>
+        public void Play(string filename, AudioParams? audioParams = null, INetChannel? channel = null)
+        {
+            AddScheduledSound(new ScheduledSound()
+            {
+                Filename = filename,
+                AudioParams = audioParams,
+            }, channel);
+        }
+    }
+}