Single Public Bool affecting all Instanced Classes

[bixel]

is there a way to have a Single Public Bool affecting all Instanced Classes?

    public class SoundPlayer
    {
        SoundEffect soundToPlay;

        public SoundPlayer(SoundEffect sound)
        {
            this.soundToPlay = sound;
        }

        public bool Mute;

        public bool MuteGlobal;

        public void Play()
        {
            if (!MuteGlobal)
            {
                if (!Mute)
                {
                    soundToPlay.Play();
                }
            }
        }
    }

Here is the scenario, I have an external soundcard and sometimes its unplugged, if I accidentally run my program with the sounds playing it will crash - I want to create a little bool I can use in Main, to say MuteGlobal, and where-ever SoundPlayer is trying to play - mute every instance of it. Is this possible? As it is I have to got through every class that Soundplayer is in and comment it out.