Can you explain a little more? Do you mean like a threaded audio stream, so anyone at a future point can reply to a specific recording/response by someone? E.g.

Can you explain a little more? Do you mean like a threaded audio stream, so anyone at a future point can reply to a specific recording/response by someone? E.g. Interjecting your own thought, that could notify the OP that the reply was made, etc?