In the future “portable surround” devices will be the successor of “stereo” applications in games or “mp3-players”. This portable technique evolutions need headphones, which offer 3D images of sound with a minimum of elevation effects and a virtual distance perception front and back. The past 119. AES till 28. AES Conference presented further problems like a compatible downmix of 5.1 to 2.0 or 4.0 signals; not only the binaural head-related signal processing. As well it should be available standardised vario 3,5” jack for stereo or more channel signal supply. Herewith will be presented main basics how to realise this spatial auditory events via 4-channel headphones plus a direct audio signal supply loudspeaker compatible.
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