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Several techniques to convey almost realistic 3D audio scenes through loudspeakers have already exist for decades, though most of them rely on large amount of loudspeakers and of course good sound quality. However, with mobile devices such smart-phones and tablets we have usually access to maximum 2 channels, the location of the speakers is not always optimal and the quality of micro-speakers is far from being what we would call reasonable. In this tutorial we will discuss how it is possible to overcome some of the limitations we encounter when reproducing spatial audio with mobile devices, what kind of applications can benefit from the use of these technologies and what challenges remain for us to solve. A redo of the tutorial IS09 held in the 145th AES Convention in New York.
