  Several types of systems were put forward during the past decades to show
that there exist {\it isospectral} systems which are {\it metrically}
different. One important class consists of Laplace Beltrami operators for pairs
of flat tori in $\mathbb{R}^n$ with $n\geq 4$. We propose that the spectral
ambiguity can be resolved by comparing the nodal sequences (the numbers of
nodal domains of eigenfunctions, arranged by increasing eigenvalues). In the
case of isospectral flat tori in four dimensions - where a 4-parameters family
of isospectral pairs is known- we provide heuristic arguments supported by
numerical simulations to support the conjecture that the isospectrality is
resolved by the nodal count. Thus - one can {\it count} the shape of a drum (if
it is designed as a flat torus in four dimensions...).
