The effect of two different contexts on pitch judgements in test trials was investigated. In one context condition, the third harmonic (plus the 7th, 9th, and 12th) of a complex tone with 12 harmonics was replaced by a non-informative noise band in the context trials, while in the other, the fourth harmonic (plus the 7th, 9th, and 12th) was replaced by a non-informative noise band in the context trials. In randomly interleaved test trials, stimuli were identical in the two conditions; there were no noise bands, the fundamental frequency was 200 + ΔF0/2 Hz in both intervals, and randomly either the third or the fourth harmonic was shifted slightly up or down in frequency with equal probability. Feedback was provided in the context trials but not in the test trials. The replacement of a given harmonic by a non-informative noise band in the context trials affected pitch judgements in test trials; the pitch judgement followed the direction of the frequency shift of that harmonic significantly less often than when a different harmonic was replaced by a non-informative noise band in the context trials. The effect was significant but small. The results are consistent with the notion that (i) the replacement of a harmonic by a non-informative noise band in the context trials reduced the contribution of that harmonic to the residue pitch in the test trials and (ii) listeners gave smaller weights to a harmonic or frequency region when they had learned that this frequency region did not provide reliable information for the task. The finding is broadly similar to effects of reliability of information demonstrated in the visual domain. It suggests that, contrary to the assumptions of contemporary pitch models, the perceived pitch can be influenced to a small extent by the learnt reliability of an individual component of a complex sound.