CERN Real-Time morphing using LEMUR analysis

• Synthesis system running in real-time on the Capybara signal processor using KYMA language;
  
• Uses "Lemur" (CERL - University of Illinois) for preparing data files (extended McAuley-Quatieri technique);
  
• Enhanced MQ model of sounds - both sinusoidal and noise-like components are represented (Lemur specifies a bandwidth (noisiness) envelope for each partial;
  
• Synthesis is done using a sinusoidal oscillator modified by the addition of frequency modulation by band-limited noise;
  
• Models note transitions as a dictionary of transition releases and transition attacks from the analysis of acoustic instrument transitions;
  
• Pruning of inaudible partials in selected frequency regions during real-time synthesis;

PROS:

• Public domain analysis package (LEMUR)
• Noise handling
• Transition model (as reported in research on violin representation)
• Continuum - continuous surface playing keyboard
  

CONS:

• Restricted availability of the Capybara signal processor

More Information at:

CERN/Lemur home-page