A method for the modification of acoustic instrument tone dynamics

A method is described for making natural sounding modifications of the dynamic level of tones produced by acoustic instruments. Each tone is first analyzed in the frequency domain and divided into a harmonic and a noise component. The two components are modified separately using filters based on spectral envelopes extracted from recordings of isolated tones played at different dynamic levels. When transforming from low to high dynamics, additional high frequency partials are added to the spectrum to enhance the brightness of the sound. Finally, the two modified components are summed and a time domain signal is synthesized.

[1]  Anders Friberg,et al.  A prototype system for rule-based expressive modifications of audio recordings , 2007 .

[2]  James W. Beauchamp,et al.  Synthesis of Trumpet Tones Using a Wavetable and a Dynamic Filter , 1995 .

[3]  S. McAdams,et al.  Acoustic correlates of timbre space dimensions: a confirmatory study using synthetic tones. , 2005, The Journal of the Acoustical Society of America.

[4]  Deepen Sinha,et al.  Accurate Spectral Replacement , 2005 .

[5]  Tae Hong Park,et al.  Feature modulation synthesis (FMS) , 2007, ICMC.

[6]  Algorithms to measure audio programme loudness and true-peak audio level , 2011 .

[7]  David A. Luce,et al.  Dynamic Spectrum Changes of Orchestral Instruments , 1975 .

[8]  Chi-Min Liu,et al.  High frequency reconstruction for band-limited audio signals , 2003 .

[9]  Axel Röbel,et al.  Analysis/synthesis comparison , 2000 .

[10]  Eric Moulines,et al.  Estimation of the spectral envelope of voiced sounds using a penalized likelihood approach , 2001, IEEE Trans. Speech Audio Process..

[11]  Lonce L. Wyse,et al.  Real-Time Iterative Spectrum Inversion with Look-Ahead , 2006, 2006 IEEE International Conference on Multimedia and Expo.

[12]  A. Ferreira,et al.  Accurate and robust frequency estimation in the ODFT domain , 2005, IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2005..

[13]  Julius O. Smith,et al.  Spectral modeling synthesis: A sound analysis/synthesis based on a deterministic plus stochastic decomposition , 1990 .

[14]  Vesa Välimäki,et al.  SUBJECTIVE EVALUATION OF MUSICAL INSTRUMENT TIMBRE MODIFICATIONS , 2004 .

[15]  Anders Friberg,et al.  Rule-Based Expressive Modifications of Tempo in Polyphonic Audio Recordings , 2007, CMMR.

[16]  Jordi Bonada,et al.  Score Level Timbre Transformations of Violin Sounds , 2008 .

[17]  Ronaldus Maria Aarts,et al.  Efficient High-frequency Bandwidth Extension of Music and Speech , 2008 .