The emergence of a pitch percept, referred to as the pitch onset response (POR), has predominantly been studied using transitions from noise to regular interval noise (RIN), click trains and more recently, harmonic complex tones. The POR is typically an asymmetrical change response which shows a larger response for stimuli that go from having no salient pitch to a salient pitch but not vice versa. However, the spectro-temporal differences between the pitch inducing stimulus and noise make it difficult to disentangle whether the response reflects a change in regularity or a true difference in pitch salience. The aim of this experiment is to use spectrally similar stimuli that differ in pitch salience (harmonic versus inharmonic tones) without changes in temporal regularity. We recorded EEG responses in normal-hearing participants to investigate the cortical correlates of pitch emergence in humans. We used the noise to RIN transitions as a baseline measure to replicate the asymmetry in the POR. We also used transitions from harmonic to inharmonic stimuli and vice versa to investigate if the POR asymmetry would hold for stimuli with minimal spectro-temporal differences. Results from this study will help us further understand the parameters affecting this response.