However, we would like to use mod_conference with custom signaling, so basically just the mixing part.  For that, we would need some low-level API for conferences, with functionality like

1. Add a participant with a given offer SDP: return an answer SDP, start mixing it in and start the RTP stream to the new participant.

2. Remove a participant, stop mixing him, and stop the RTP stream to the respective device.

Can this be achieved by using mod_event_socket, or would we have to implement a proper FreeSWITCH module for such things?