  A non-perturbative method of Field Correlators (FCM) is applied to study
speed of sound in quark-gluon plasma at temperatures above the deconfinement
transition 1<T/T_c<3 (Tc=160 MeV) under a uniform magnetic field up to eB ~ 1
GeV^2.
  The speed of sound in N_f=2+1 QCD quark-gluon plasma is found to exceed the
conformal limit (1/3) at very large magnetic field strengths eB>0.5 GeV^2.
  At large temperatures, the speed of sound tends to the conformal limit;
  low-temperature behavior demonstrates inverse magnetic catalysis.
  The effect of magnetic field on the speed of sound in quark-gluon plasma is
found to be negligible in any existing Heavy Ion Collision experiment,
including \sqrt{s_{NN}}=5.02 TeV Pb-Pb collisions at LHC.
