Previous research on the effect of musical style on harmonic expectancy indicates that listeners are differentially sensitive to certain chord progressions depending on the stylistic context in which they are presented (Vuvan & Hughes, 2019). Despite this, there is little research on the neural basis of listener expectation as a function of musical style. The current study focused on the event related potential known as the early anterior negativity (EAN, Loui et al., 2009), which has been shown to be correlated with perception of musical syntax violations. Trials were blocked by style (Classical, Rock), and contained a four bar-long excerpt ending in either a V-I or a bVII-I cadence. We hypothesized that the bVII-I cadence would evoke an EAN in the classical context, where it is unexpected, but not the rock context, where it is expected. Data collection is incomplete due to the Covid-19 pandemic. However, preliminary analyses show that some participants appear to exhibit a stronger EAN response to the bVII in the classical condition than the rock, converging with behavioural results. Completed data collection is expected to provide evidence for the effect of musical style on the early non-conscious neural processing of harmonic syntax.