[DeeperThought]

I don't know how SST did it, but I think all you have to do is add one line to the APLAYER actor that says "soundonce SOUNDNAME". But perhaps there is a better method. See this part of USER.CON:

// *****************************************
// ACTOR SOUNDS
// *****************************************

// BIT 0 (1) Repeat
// BIT 1 (2) MUSICANDSFX (used for)
// BIT 2 (4) A Duke Voice
// BIT 3 (8) Par. Lockout
// BIT 4 (16) Glob. Heard (sndist = 0)

I would try using bit 1 and 4 in the sound definition (so the fourth parameter in the definesound line for the sound would be 17). Then maybe you could define an actor that simply plays the sound one time and place the actor near the player start position. You could have a different actor for each .wav, so you could easily have different music for each level (which would be harder to do in 1.5 CONs if the APLAYER actor is making the sound). And that's all I have to say about it.

By the way, it's really stupid to not to use EDuke32.