diff --git a/src/add-ons/media/media-add-ons/mixer/RtList.h b/src/add-ons/media/media-add-ons/mixer/RtList.h
new file mode 100644
index 0000000000..fabef04461
--- /dev/null
+++ b/src/add-ons/media/media-add-ons/mixer/RtList.h
@@ -0,0 +1,64 @@
+#ifndef _MEDIA_RT_LIST_H
+#define _MEDIA_RT_LIST_H
+/* Copyright (C) 2003 Marcus Overhagen
+ * Released under terms of the MIT license.
+ *
+ * A simple list template that uses realtime
+ * memory and does no error checking. Since
+ * it doesn't call constructors ot destructors,
+ * don't use it to store objects.
+ */
+ 
+#include <RealtimeAlloc.h>
+
+template<class value> class RtList
+{
+public:
+	RtList()
+	 :	item_max(INIT_COUNT),
+	 	item_count(0),
+	 	items((value *)rtm_alloc(NULL, sizeof(value) * INIT_COUNT))
+	{
+	}
+	
+	~RtList()
+	{
+		rtm_free(items);
+	}
+
+	value *Create()
+	{
+		if (item_count == item_max) {
+			item_max += INC_COUNT;
+			rtm_realloc((void **)&items, sizeof(value) * item_max);
+		}
+		return &items[item_count++];
+	}
+	
+	value *ItemAt(int index)
+	{
+		return &items[index];
+	}
+
+	int CountItems()
+	{
+		return item_count;
+	}
+
+	void MakeEmpty()
+	{
+		item_count = 0;
+	}
+
+private:
+	RtList(const RtList<value> &other);
+	RtList<value> &operator=(const RtList<value> &other);
+
+private:
+	enum { INIT_COUNT = 8, INC_COUNT = 16 };
+	int item_max;
+	int item_count;
+	value *items;
+};
+
+#endif // _MEDIA_RT_LIST_H