There are no stupid questions (but those are the easiest to answer...) ![]()
Many spells are, indeed, "legacies" from earlier editions when the guidelines were far, far looser, less unified and overall less coherent. You'll run into a lot of them, spells that are colorful and classic and traditional (in AM, anyway), and so aren't radically re-defined, yet don't actually, technically fit the new rules
Whispers Through The Black Gate is one such - there's no reason the voice should be heard - it's not a Rego forcing a sound, but an Intellego spell to gain knowledge - but the description says that the voice is heard by all. Meh.
You can do one (or more) of several things...
- Ignore it.
- Fix each in turn to match the Guidelines.
- Explain to your Players that "magic is weird", and then ignore it.
- A little of 2 and 3 combined
I usually choose #3 unless it's really problematic. And nothing says that the spell a PC or an NPC knows is the same as the "classic" version - new spells are personally invented all the time, so the variations can be infinite.