Yeah I thought the client got a lot of this extra information for performance reasons more than anything e.g. only play enemy shooting sounds if the enemy is ne

Yeah I thought the client got a lot of this extra information for performance reasons more than anything e.g. only play enemy shooting sounds if the enemy is nearby - do all the processing on the client so that the server doesn't need to work out a matrix of who can hear who and send the appropriate message to each client.