That thread about Max, not related to BC, except that you could make models for BC in it, but that's only a small, unrelated feature (didn't even see it either).
So this thread, which is about a problem with a mod, ought to have been here in Tech Support.
Anyway, on to the real problem...
Missing sounds in general usually means a faulty encode, BC is kinda picky (tough it depends on the sound settings, EAX or not, most people don't have EAX).
Missing sounds on torpedo/pulse launch usually mean a missing sound, or a faulty sound plugin, or a wrong sound name used in the projectile.
In this case it's a wrong sound name (or missing Sound plugin), put this in scripts/Custom/Autoload