The Legacy Sound system exists to maximise the compatibility of
GameMaker: Studio with previous projects that were made with
older versions of GameMaker and as such it needs to be
switched on through the setting in the
Global Game Settings: General Tab as the default setting is for
GM:S Audio support. It should be noted that these functions
are not as flexible nor as stable as the newer ones and where
possible they should be avoided or changed.
The following legacy functions exist that deal with sounds:
Below you can find a list of functions that have been deprecated in GameMaker: Studio. These functions will no longer work as you must have all sounds included with the game bundle: