ForeverVoice

Voices that fade instead of stepping

Nothing new to set: 1.5 only changes how the voices move between the
settings you already have.

- Voices that fade instead of stepping. A position is shared every two
  seconds, and the volume moved at every one of them: someone walking
  towards you got louder in steps. Their position is now walked from the
  old one to the new one, so the distance changes all the time and the
  voice follows it.
- The volume is followed twelve times a second instead of four, and its
  fade is taken from the time really elapsed rather than counted in ticks.
- The range, the curve and the volume up close are unchanged. They are
  simply reached without the staircase.
- Each member's name and group slot are looked up four times a second
  instead of at every volume step, so the faster fade costs nothing in a
  raid.