engine almost working, backup before adding gas types.

Audio/SoundEngine.cs

@@ -0,0 +1,45 @@
+namespace FluidSim.Audio
+{
+    public class SoundEngine : IDisposable
+    {
+        private readonly AudioOutputStream _stream;
+        private bool _isPlaying;
+
+        public SoundEngine(SimulationRingBuffer sourceBuffer, int bufferCapacity = 16384)
+        {
+            _stream = new AudioOutputStream(sourceBuffer);
+        }
+
+        public void Start()
+        {
+            if (_isPlaying) return;
+            _stream.Play();
+            _isPlaying = true;
+        }
+
+        public void Stop()
+        {
+            if (!_isPlaying) return;
+            _stream.Stop();
+            _isPlaying = false;
+        }
+
+        public double Speed
+        {
+            get => _stream.Speed;
+            set => _stream.Speed = value;
+        }
+
+        public float Volume
+        {
+            get => _stream.Volume;
+            set => _stream.Volume = value;
+        }
+
+        public void Dispose()
+        {
+            Stop();
+            _stream.Dispose();
+        }
+    }
+}