How to play background music in a ConfBridge conference?

Question

Asterisk

Hello!
Question to Captain Evidence :)
How to do two things on the 11th asterisk for all dynamically created conference rooms:
1. after the caller enters the conference, you need to play sound files to him according to the logic based on records in the Mysql database;
2. during the entire duration of the scenario specified in paragraph 1, it is required to play background music to it
. There will be no dependencies between the sounds of paragraph 1 and the music from paragraph 2. Background... just a background...
It seems that the call-files are too cumbersome... Something in the Originate region is spinning in my head.
Scripts? AMI/agi?
PS There are no other participants (in each conference) and there will not be ... An individual room is created for each informing participant (ConfBridge(${CALLERID(num}))

Answer 1

A thought came up here.
Another member of the conference must be used for the background.
We launch sipp into the conference, for example, in the script of which it appears which media rtp to play when connected.
The whole thing is to beat through AGI, which, in turn, will call sipp with the desired script. From AGI, by the way, and pass the channel variable (= conference number).