Real-Life Auditory "Training"?

I work with a university engineering and music student who recently completed my low-gain programmed hearing aid (LGHA) Trial. As a result of their Trial, they are now finally able to hear subtle sounds in music and tuning that, due to APD, were never accessible to them before.

While tuning their instrument, they had never been able to hear the beats of a standing wave. With practice using the aids, these beats have become increasingly apparent.

They also told me they were previously only able to tell if they were playing their instrument off key, but now have started to become aware of when they are on key as well. As a result of the auditory exposure and practice from the aids, these critical music listening skills have now generalized to the point that they can discriminate them either with or even without the low-gain programmed aids.

Effective auditory training does not need to be artificial or time consuming. Given the right conditions, it can be practiced in the real world.