Bard: Ervaj line has casting sound effect?

[Basenji]

Bard songs are almost universally silent. The exceptions that I recall were Anglistch's Assonance and Kizumi's Note of Preservation, and both of those have unusual refresh times - you can't twist them. This song is one you twist, so the sound replays every 15 seconds or so. That's why I'm sure you'd see reports of it being annoying if it had a sound effect when released in live.

Also, I'm curious about this part: "uses a spell effect that is normally intended for regular spells and not songs"

I remember these songs have a totally unique effect in the game. Are you saying that this song is using an effect that is in use somewhere else? Can you tell me which of its effects are used by another spell, and the name of that spell? If you can give me that info, I'll dig a little more.