In this paper we study harmonic analysis on the Einstein gyrogroup of the open ball of R n , n ∈ N, centered at the origin and with arbitrary radius t ∈ R + , associated to the generalised Laplace-Beltrami operatorwhere κ = n + σ and σ ∈ R is an arbitrary parameter. The generalised harmonic analysis for L σ,t gives rise to the (σ, t)-translation, the (σ, t)-convolution, the (σ, t)-spherical Fourier transform, the (σ, t)-Poisson transform, the (σ, t)-Helgason Fourier transform, its inverse transform and Plancherel's Theorem. In the limit of large t, t → +∞, the resulting hyperbolic harmonic analysis tends to the standard Euclidean harmonic analysis on R n , thus unifying hyperbolic and Euclidean harmonic analysis.MSC 2000: Primary: 43A85, 42B10 Secondary: 44A35, 20F67