Use the rule of three as followed

1:13:05 are 73 mins and 05 seconds

73x60=4380 seconds plus 05 seconds are 4385 seconds!!!

1:13:08 therefore are 4388 seconds

NOW: if ...

4385 = source framerate (lets assume 25 fps!)

then

4388 = ?

And here you got me as I don't know that rule of three formula right now

And therefore the result would be the new framerate where the sound should be converted to.

And this will be done afterwards using besweets OTA options below left.