Two eye-tracking experiments tested (a) whether L2 learners benefit from the consistency of input modality (auditory instead of written processing instruction [PI] training) and (b) whether they benefit from training using the same voice as the test voice. Results confirmed a robust effect of PI training on picture-selection accuracy, yet the improvement did not differ between training modalities. Eye-tracking data revealed resilient looks to the incorrect (first noun = agent) picture even after training, demonstrating the challenge in tuning to the grammatical forms while processing auditory L2 input. The effect of voice familiarity was larger for the male voice, which had longer duration for the later cue ("à Marie/Pierre") than the female voice. Auditory PI training can be as effective as written PI training, but it does not immediately enhance learners' sensitivity to grammatical cues. However, learners may benefit from hearing a salient grammatical cue toward the end of the sentence.