Method for using a mobile device equipped with at least two microphones ( m 1, m 2) for determining the direction of loudspeakers l k in a setup of a surround sound system including N loudspeakers, k = 1... N, wherein said direction is expressed by an azimuth angle φ k and a polar angle θ k, said method including: a) setting initial values ( φ 0,θ 0) for said azimuth angle φ k and said polar angle θ k for loudspeaker l k direction; b) in a first loop over mobile device position angle α for the determination of one of φ k and θ k, and thereafter in a second loop over mobile device position angle α for the determination of the other one of φ k and θ k: c) setting k = 1; d) in a sub-loop over k: e) in a sub-sub-loop over a rotation angle of said mobile device: f) causing loudspeaker l k to emit a test signal ( s k ( t)); g) rotating said mobile device and providing for said mobile device a corresponding measured mobile device rotation angle value α k; h) capturing corresponding mobile device microphone signals (y k 1 ( t), y k 2 ( t)) from said loudspeaker l k test signal; i) calculating from said microphone signals a corresponding TDOA value ( τ k ( α k)); j) if said TDOA value ( τ k ( α k)) is not zero or is not smaller than a predetermined threshold value, returning to step f); k) otherwise, calculating a corresponding azimuth φ k or polar θ k, respectively, angle value for the position of loudspeaker l k; l) incrementing k by '1'; m) if k ≤ N, returning to step f); n) otherwise, checking whether both of φ k and θ k have been determined, and if not true, returning to step b); o) after all positions of said N loudspeakers have been determined, providing a corresponding set of N pairs of azimuth and polar angle values φ k and θ k for said loudspeakers l k and for all k. a) setting initial values ( φ 0,θ 0) for said azimuth angle φ k and said polar angle θ k for loudspeaker l k direction; b) in a first loop over mobile device position angle α for the determination of one of φ k and θ k, and thereafter in a second loop over mobile device position angle α for the determination of the other one of φ k and θ k: c) setting k = 1; d) in a sub-loop over k: e) in a sub-sub-loop over a rotation angle of said mobile device: f) causing loudspeaker l k to emit a test signal ( s k ( t)); g) rotating said mobile device and providing for said mobile device a corresponding measured mobile device rotation angle value α k; h) capturing corresponding mobile device microphone signals (y k 1 ( t), y k 2 ( t)) from said loudspeaker l k test signal; i) calculating from said microphone signals a corresponding TDOA value ( τ k ( α k)); j) if said TDOA value ( τ k ( α k)) is not zero or is not smaller than a predetermined threshold value, returning to step f); k) otherwise, calculating a corresponding azimuth φ k or polar θ k, respectively, angle value for the position of loudspeaker l k; l) incrementing k by '1'; m) if k ≤ N, returning to step f); n) otherwise, checking whether both of φ k and θ k have been determined, and if not true, returning to step b); o) after all positions of said N loudspeakers have been determined, providing a corresponding set of N pairs of azimuth and polar angle values φ k and θ k for said loudspeakers l k and for all k.