anyone care to write little alias how to get
music file lenghth of time and if possible explain what
each line does ?

$sound(%filename).length

Explanation: Line 1, returns length of %filename

-genius_at_work

heh uhm i get some weird number...
may i ask how to convert it to minutes:secs ?

you mean $duration?

that strange number isn't really strange, but rather the length measured in milliseconds, so to get a min:sec reference use

$asctime($calc($sound(%filename).length / 1000),nn:ss)

thanks guys, i apreciate it.