expand voice: found Rest 4/4
makeGap 1/4 at 0 track 0
remove Rest 4/4 at tick 0 track 0
  makeGap: remove 4/4 at 0
  makeGap: 1/4 removed 3/4 too much
   dList: 2

   gap at tick 0+480
addClone Rest at 480 1/4
addClone Rest at 960 1/2