am a102871c: am b80e610b: Merge "Visualizer: replace the FFT implementation with a faster one." into gingerbread

Merge commit 'a102871c7cbb74ebddc53231a871145de61351b0'

* commit 'a102871c7cbb74ebddc53231a871145de61351b0':
  Visualizer: replace the FFT implementation with a faster one.