AES Munich 2009
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AES Munich 2009
Tutorial T1

Thursday, May 7, 09:00 — 11:00

T1 - A New Downmix Algorithm Optimizing Comb Filter Performance

Jörg Deigmöller, IRT Munich

Downmixing 5.1 surround sound to 2.0 stereo is a necessity in current challenging production environments. Straightforward downmix coefficients, as simple as they are to execute, result in comb filtering effects dependent on the correlation of the signals that are downmixed. A new algorithm is presented that tackles this issue with optimized decorrelation pre-processing, leading to much improved timbre of the downmixed signal.