Asterisk. Music playing in the background while an AGI request is being executed?

Question

Asterisk

there is a small dialplan.
exten=> 6,1,answer()
;exten=> 6,n,Background(file)
;exten=> 6,n,MusicOnHold()
exten=> 6,n,AGI(test.py)
exten=> 6 ,n,Dial(sip/111,,m)
exten=> 6,n,hangup()
The script itself runs for about 5 seconds. How to make something play during script execution?
MON and Background did not transfer control to the next command of the dialplan. And it turns out that the music starts playing only when the Dial is triggered.

Answer 1

try in the AGI script itself

SET MUSIC on default
...
прочие действия
...
SET MUSIC off

Answer 2

Park() / ParkedCall()