OMI audio emitter content and use case celebration

[mrmetaverse]

DoD: Once we have

@antpb and @Elirudite suggested tweaks to our content and site to raise awareness for the OMI audio emitter. This is also related to a theme called out for future Wednesday demos. Maybe we schedule a Wednesday to be emitter day? We can showcase use cases and write the blog as a result. Then add some reference to the site per Shadows suggestion.

Thoughts?