adrianm, i did setVolume to 0…it didnt’ resolved the problem.
Rob, if you read my first post i said i used a timer…but now (after upgrade corona) that problem still exist even with 1000 delay timer.
the music on the background is not harsh it’s a background music…and like a background music it can be muted on the app.
the click noise happens before any of my code kicks off. it is before splash screen. my code starts with a blank file only for copy database to tempory directory for r/w. prepare a bunch of other data, only then i pass to main main screen where i declare my music and play it if on my database is true. so i give plenty of time to the app to do it’s “magic”.
like i said this only happens in IOS and with a couple of lines i could reproduce the problem.
not trying to offend anyone, because i really appreciate from my heart the work corona staff and members from this community do for others, but this problem remember me a joke about a person that gone to the doctor and asked him…“doctor, if i press here it hurts”. doctor response: “well, don’t press it”…
regards, carlos 
p.s: bug report {8488245}