SoundPool :: a C# XNA 4.0 Snippet for Properly Instancing Sound Effects Using an As-Needed Pool Methodology

SoundPool.cs

// Create a pool:
//    SoundPool explosion = new SoundPool(Content, "explosion");          - uses explosion.wav from the content folder
// Play back the sound:
//    explosion.Play();
// Play back the sound with some funk:
//    explosion.Play(Volume: 1.0f, Pan: 0.0f, Pitch 0.0f);
//
// If you're worried about performance, I promise this is the fastest and cleanest way.
// You may run into issues if you try to spam too many sounds on the wrong devices, from MSOFT:
//  
//    On Windows Phone, a game can have a maximum of 16 total playing SoundEffectInstance instances at one time, 
//    combined across all loaded SoundEffect objects. The only limit to the total number of loaded SoundEffectInstance 
//    and SoundEffect objects is available memory. However, the user can play only 16 sound effects at one time. 
//    Attempts to play a SoundEffectInstance beyond this limit will fail. On Windows, there is no hard limit. Playing too 
//    many instances can lead to performance degradation. On Xbox 360, the limit is 300 sound effect instances loaded or playing. 
//    Dispose of old instances if you need more.

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace YOUR_NAMESPACE_HERE_BRO
{
    class SoundPool
    {
        public SoundEffect               sound;
        public List<SoundEffectInstance> pool;
        public SoundPool(ContentManager Content, String Filename)
        {
            sound = Content.Load<SoundEffect>(Filename);
            pool  = new List<SoundEffectInstance>() { sound.CreateInstance() };
        }
        public void Play(float Volume = 1f, float Pan = 0f, float Pitch = 0f)
        {
            for(int p = 0; p < pool.Count; p++)
            {
                if(pool[p].State == SoundState.Stopped)
                {
                    Play(pool[p], Volume, Pan, Pitch);
                    return;
                }
            }
            pool.Add(sound.CreateInstance());
            Play(pool[pool.Count - 1], Volume, Pan, Pitch);
        }
        private void Play(SoundEffectInstance SoundEffectInstance, float Volume, float Pan, float Pitch)
        {
            SoundEffectInstance.Volume = Volume;
            SoundEffectInstance.Pan    = Pan;
            SoundEffectInstance.Pitch  = Pitch;
            SoundEffectInstance.Play();
        }
    }
}