Log Message:
audio/din: Updates to 51.1

Changes since 50.2:

DIN Is Noise 51.1:
  * improved DIN font *
  ! fixed drone arrow defaults save/load !

DIN Is Noise 51:

   + drone is anchored or launched on creation
      anchored means stays fixed at the place of creation
      launched means 'flies' off based on its velocity and gravity
        try with Menu > Drone Tools > Add / Wand
      set at Menu > Drone Params > Defaults

  + set velocity +/ acceleration vectors of drones to presets via Menu > \ 
Drone Params > Motion > Set velocity/acceleration
    + presets are +ve or -ve vertical, horizontal, velocity, acceleration and zero

  + auto flip (clock < > anti-clock) auto rotating velocity/acceleration \ 
vectors every some degrees
    + via Menu > Drone Params > Auto flip > Set / Unset / Toggle
    + default 'every some degrees' is 90 degrees

  + gravity
    + presets for gravity vector
       0, left, right, up and down
    + gravity tracks mouse position
      + click Gravity > Mouse
    + gravity tracks the first among selected drones
      + click Gravity > Drone
        ! as drone selection changes, gravity may track a different drone !
      - removed Menu Drone Params > Track gravity

  + mesh polygon filling per drone color

  * color of a launched drone is same as color of the launcher
    * try changing color of the launcher as drones are launched

  * changed color of velocity/acceleration vectors to move away from green (used \ 
for selection) and red (used for errors)
    * cyan = color of velocity vector of all drones
    * (reddish) magenta = color of acceleration vector of all drones

  * changed arrow visualisation of velocity +/ acceleration vector of all drones
    * Head
      * edit the position of the arrow tip
        * can go 'above' the vector tip ie > 1.0
        * can go 'below' the drone location ie < 0.0
        * can be on the body ie 0 <= tip <= 1.0
    * Shoulder Position
      * edit position of the arrow's shoulder tips
    * Shoulder Width
      * edit width of the arrow's shoulder
    + Cap or Decap the arrow

  + set default arrow head, shoulder position and width, cap from Menu > \ 
Drone Params > Defaults
    + used when adding & wanding drones
    + change existing drone's velocity/acceleration vector arrow params via Menu \ 
> Drone Params > Visual

  + improved geometric chuck
    + on a chuck with N drones, the first N - 1 drones have trail set to 0
      + the last drone has trail set to 10000
    + toggle auto reset trails
      + Menu > Drone Params > Chuck > Auto reset trails
    + 2 changes above aid visualisation and experimentation instead of manual trail
      resize/reset every time after changing a chuck param
    + toggle chuck outline
      + click Menu > Drone Params > Chuck > Draw chuck outline
      + aids screenshotting
    + chuck outline drawn per drone color

  * default scale/rotate drones center to microtonal keyboard center

  * default selected range to C Eb

  + mouse wheel on microtonal keyboard to scroll along horizontal
    + press SHIFT and scroll to scroll along vertical

  * short form of echo command is .

  * improved bpm handling of drone pendulums and meshes

  * improved drone trail handling/display

  * close menu after setting modulation direction

  ! fixed bug in zoom of curve editor when mouse slider is active !
  ! fixed draw crosshairs on drone mesh preview !