I'm currently looking at a vocal score, and there's a small note right above a normal-sized note. Ordinarily, I would presume this to be a cue note, except that this isn't the start of the singer's part, and in any case, you'd expect cue notes to go where the singer has rests, so that (s)he can actually be cued. In addition, I don't think it's a grace note, since it's notated as a quarter note and is on top as opposed to preceding the main note. Does anyone know what this is?
