Abstract: To locate sound sources in space so called Head Related Transfer Functions (HRTF) are commonly applied. Typically, Head Related Frequency Responses (HRFRs) for hundreds of individuals are averaged to produce average HRFR for each location. The averaged HRFR data is then used for location coding of audio sources in recordings and playback. The presented invention solves the location coding by breaking down the localization process in a novel manner introducing a new time domain focused approach. The approach is called Multiple Order HRTF according to the present invention. The approach allows averaging across individuals and with its time domain coding provides more stable localization of sound sources that is clearly positioned outside of the listener’s head through headphones. It is also possible to create virtual surround sound sources around a listening room using only two stereo speakers by embedding coded position information into the direct sound from the stereo speaker pair.

Abstract: The Stereo Unfold Technology solves the inherent problems in the stereo reproduction by utilizing modern DSP technology to extract information from the Left (L) and Right (R) stereo channels to create a number of new channels that feeds into processing algorithms. The Stereo Unfold Technology operates by sending the ordinary stereo information in the customary way towards the listener to establish the perceived location of performers in the sound field with great accuracy and then projects delayed and frequency shaped extracted signals forward as well as in other directions to provide additional psychoacoustically based clues to the ear and brain. The additional clues generate the sensation of increased detail and transparency as well as establishing the three dimensional properties of the sound sources and the acoustic environment in which they are performing.

Abstract: The Stereo Unfold Technology solves the inherent problems in the stereo reproduction by utilizing modern DSP technology to extract information from the Left (L) and Right (R) stereo channels to create a number of new channels that feeds into processing algorithms. The Stereo Unfold Technology operates by sending the ordinary stereo information in the customary way towards the listener to establish the perceived location of performers in the sound field with great accuracy and then projects delayed and frequency shaped extracted signals forward as well as in other directions to provide additional psychoacoustically based clues to the ear and brain. The additional clues generate the sensation of increased detail and transparency as well as establishing the three dimensional properties of the sound sources and the acoustic environment in which they are performing.

Abstract: The Stereo Unfold Technology solves the inherent problems in the stereo reproduction by utilizing modern DSP technology to extract information from the Left (L) and Right (R) stereo channels to create a number of new channels that feeds into processing algorithms. The Stereo Unfold Technology operates by sending the ordinary stereo information in the customary way towards the listener to establish the perceived location of performers in the sound field with great accuracy and then projects delayed and frequency shaped extracted signals forward as well as in other directions to provide additional psychoacoustically based clues to the ear and brain. The additional clues generate the sensation of increased detail and transparency as well as establishing the three dimensional properties of the sound sources and the acoustic environment in which they are performing. Moreover, also enhanced grouping as described is one aspect possible to implement according to the present invention.