Sega dreancast headset modification

I have the idea of taking a generic memory card and turning it into a headset accessory, what do you guys think of this

 

What you're thinking of might already exist as the Seaman / Planet Ring microphone adapter or the Dreameye adapter that comes with an actual headset. Both devices are only a microphone, though.

 

yeah but i mean something thats not really rare and can be available to everybody that owns a dreamcast that works or has some sort of mod like an sd or a hard drive mod to run games if their gd rom drive is busted like mine is (i need to get my dc fixed i know)