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BeatFx v1.0

BeatFx is a suite of real-time audio effects that use beat tracking to allow automatic synchronisation of effect parameters to the beat of the input audio. Delay times can be set in beats and the modulation rate of tremolo, auto-wah and flanger effects can be controlled by a number of cycles-per-beat. As the tempo changes, these effects automatically adapt to maintain synchronisation.

Available As...

  • Max/MSP Externals
  • Audio Unit Plug-Ins



  • Mac OS X on an Intel Mac
  • Audio Running at 44.1kHz
  • Max/MSP (for Max Externals only)

Demonstration Video

More Information

  • A. M. Stark, M. D. Plumbley and M. E. P. Davies. Rhythmic Analysis for Real-Time Audio Effects. In Proceedings of the the International Computer Music Conference, Belfast, August 2008.
  • A. M. Stark, M. D. Plumbley and M. E. P. Davies. Real-time beat-synchronous audio effects. In Proceedings of New Interfaces for Musical Expression (NIME 2007), New York, NY, USA, June 6-10, 2007, pp 344-345, 2007.
  • A. M. Stark, M. D. Plumbley and M. E. P. Davies. Audio effects for real-time performance using beat tracking. In Proceedings of the the 122nd AES Convention, Convention paper 7156. Vienna, Austria, May 5-8 2007.