Apple

-- begin burning to the disk

"drutil -drive " & driveNr & " burn -verify " & (quoted form of (POSIX path of dropItem))

set burnpid to do shell script the result & " &> /dev/null & echo $!"

-- play music until burn completed

my playUntilComplete(burnpid)

end main -------------------------------------------

And the music is played by this handler ...

on playUntilComplete(mainPID)

-- The code here finds a random audio file and

-- saves an alias to the file in the variable 'soundAlias'

-- You don't need to be confused by that.

set soundPath to (quoted form of (POSIX path of soundAlias))

set soundpid to do shell script "afplay " & soundPath & " &> /dev/null & echo $!" -- start the music

repeat

delay 1

try

do shell script "ps -p " & mainPID

if not (the result contains mainPID) then error -- here is where you exit the loop when the lengthly 'do shell script' finishes !!!

on error

exit repeat

end try

try

do shell script "ps -p " & soundpid

on error

set soundpid to do shell script "afplay " & soundPath & " &> /dev/null & echo $!" -- restart the music (loop)

end try

end repeat

try

do shell script "kill " & soundpid -- kill the music

end try

end playUntilComplete -------------------------------

I am not recommending that you play music while waiting for completion,

but you can write a 'doSomethingUntilComplete' handler that fits your situation.

References:
	>Ignore responses from do shell script (From: Phil Stokes <email@hidden>)