Advanced methods for shaping time-frequency areas for the selective mixing of sounds

Citation

Kleczkowski A & Kleczkowski P (2006) Advanced methods for shaping time-frequency areas for the selective mixing of sounds. In: Audio Engineering Society - 120th Convention Spring Preprints 2006, Volume 4. 120th Convention of the Audio Engineering Society - 2006, Paris, France, 20.05.2006-23.05.2006. New York: Audio Engineering Society, pp. 1792-1799. http://www.aes.org/publications/preprints/lists/120.cfm

Abstract
The Selective Mixing of Sounds (presented in AES paper 6552) contains a large and conceptually challenging part, which had not been developed previously. This is a method of determining the areas in the time-frequency plane. It has a major effect on the quality of the sound. In this paper we propose and compare a range of appropriate algorithms. We begin with a simple two-dimensional running mean combined with a rule selecting the track characterised by the maximum energy, followed by a low-pass filter based on the 2-dimensional Fourier transform. We also propose several novel methods based on Monte-Carlo approach, in which local probabilistic rules are iterated many times to produce a required level of smoothing.