Resonances are ubiquitous in nature. In this talk, I will focus on
resonances due to the interaction of two black holes orbiting a central
massive black hole. Such tidal resonances will generically occur for
Extreme Mass Ratio Inspirals (EMRIs), if nearby compact objects exist.
By probing their influence on the waveform, we can in principle extract
information about the environmental tidal field of the EMRI system,
albeit at the cost of a more complicated waveform model.