  A formalism to study the mode-by-mode response to the energy deposition of
external hard partons propagating in a relativistic fluid is developed, based
on a semi-analytical solution of conformal fluid-dynamics. The soft particle
production resulting from the jet-medium interaction is calculated and the
recoil of the viscous medium is studied for different orientations of the
relativistic jets, and for different values of the specific shear viscosity
$\eta/s$.
