Log Message:
audio/din: Updates to 49

Changes since 48:

DIN Is Noise 49:

  /* position (instead of modulation until DIN48) affects velocity vector of drones

  /* Set center for rotation and scaling of drones:

    Menu > Drone Tools > Auto Center uses average center of selected drones
    Choose Menu > Drone Tools > Set to mouse and Click on it to set center to
    point under mouse cursor. Click to stop.
      You can also click and just move the magenta cross that marks the center

  on mouse slider:

  /* warp mouse position when rolling wheel
  /* press / to toggle warp mouse at boundary

  * improved the drone selector / drone mesh/pendulum preview on microtonal keyboard

  * show hz/vol for selected drones only (instead of all drones until DIN48)

  ! fixed: flip (using ` key shortcut) between instruments loads the correct \ 
editors !

  EXPERIMENTAL:

  /*  when scaling or rotating drones, change scale or angle increments using \ 
mouse slider (see
      DIN 48 CHANGELOG below for how to do this) to change scaling +/ rotation \ 
'speed'