Sorry, TODO is written in Japanese.

* ǂ݂₷dR[hƏȃCȉZ̃R[hׂD
@(݂̃R[h͋ICǂ݂₷d)
* ʂȃmۂĂD
  FFTSIZE/2+1 ŏ\Ȃ̂D
  (͉\)
