Talk:Panning law
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Problems
editThere may be some problems in the current article:
If a Stereo signal with completely correlated information (identical) in both channels is summed to Mono, the resultant level of the Mono signal will be 6dB higher. Although it is not typical, it is also not a given that uncorrelated L&R audio summed will be 3dB higher. It may be more or less depending upon how correlated the material is at any point in time.
Additionally, in the Radio example of a Stereo mix being transmitted Mono, typically the Stereo Mix would have used a Pan Law setting that would have already attenuated the center-panned Mono vocal by 3dB or so. While the Mono downmix will increase the level of the Vocal most likely by 6dB, rather than 3dB. The vocal may sound 3dB louder than mixed, as mentioned, depending on Pan Law used for the original Stereo Mix and how hard the other elements were panned.
Bullmoon (talk) 03:27, 3 March 2009 (UTC)
The math is wrong. For identical signals on left and right, the sum is +3dB higher, not +6dB: The sum of two idential signals has twice the power of one of the signals, thus 10 * log10(2) = 3dB. As you are calculating with the power of sound over here, it's 10 * log10(p/p_0)² = 20 * log(p/p_0). 2A02:908:D82:5940:DC3B:A08B:152A:4EC1 (talk) 13:25, 18 March 2016 (UTC)