Using level specific Audio datablock files

Is there a safe, reliable method for using level specific audio datablock files?

I have a simple idea for it, and I was wondering if this would be safe.

In game.cs, inside 'startGame(%level)', I simply check against the level that is about to be loaded, and execute the appropriate script containing audio data blocks.

This does load the audio, but is doing it this way safe? That is, when a level is ended and unloaded, are those audio datablocks unloaded along with all the other assets in the level?

In game.cs, at the top of function startGame():

%levelFileName = fileName( %level );
	
if( strcmp( %levelFileName,  "Screen_MainMenu.t2d" ) == 0 )
{
	exec( "./AudioDataBlocks_MainMenu.cs" );
}
else if( strcmp( %levelFileName, "Screen_MapSelect_PowerUp.t2d" ) == 0 )
{
	exec( "./AudioDataBlocks_MapAndPowerUpScreen.cs" );
}
else
{
	exec( "./AudioDataBlocks_Levels.cs" );
}