What is the Buddhist perspective on passively altering your subconcious? Firstly I'd like to provide some context:

When I first began getting into the Buddhist teachings, specifically that of the Theravada tradition, I'd often do things such as passively play the Dhammapada in my earphones while riding my bike, or keep it on low volume in the background while I did something else. My goal was to be able to gain a basic grasp of the dhamma through forced repeated listening, and to an extent it worked in the sense that I memorized a lot of verses and ideas found in the Dhammapada, and upon hearing a verse quoted, I have an "aha" moment in the sense that It feels familiar. Furthermore, my mind and speaking style had a subtle change as well, with my head being fixated on "illusions" found in everyday physical existence.

Overall, there was definitely a change in my physical being.

In Buddhism, mindfulness is praised and shown as the key to making spiritual progress. While I did employ mindful practices such as watching my mind in everyday life and meditating every once in a while, the practice I used for the longest time was definitely not that of a mindful one. 

Yet, it seemed to have occurred to me that reaching a certain point in Buddhist practice, even through mindful meditation, requires a certain degree of destroying the old and replacing with the new, in the sense that old beliefs such as those cultivated through childhood can prevent one from going forward in their spiritual practice, or in that sense any practice, be it learning a skill or whatever (i.e saying to yourself constantly that "I'm this, I'm this kind of person/ I was made to do X").

Whether through the words of Buddha or through the teachings of other Buddhist practices such as those of a tantric origin, what is the Buddhist perspective on knowingly "brainwashing" or "rewiring" yourself via methods of repeated listening, binaural beats, and other various forms of hypnosis and subconcious alterations to make changes to your life and perspective on things?
Sorav,

Interesed, serious and the Tripple Gems respecting readers, 

listening to the teachings, if done right, straightens ones Right view. Doing it wrong increases wrong view and primaly respect. Althought even foolish and respectless monks merely even force to make Dhamma simply food for consuming and throw it on the worlds market for short and poor livelihood, one should not follow their way and use the medicine right.

Listen unattentive Dhamma while doing even unwholesome deeds manifest on and on latent disrespect an closes up the door to Dhamma.

Some good advices in this regard are found in "Abidhamma in daily live" (dhammadesana), by Ven. Ashin Janakabhivamsa.

It's not mindful and not conductive to just consume Dhamma, since it requires giving at fist place.

To answer short on "What is the Buddhist perspective on passively altering your subconcious?"

The "Buddhists" perspective here is trade for gain and the world, while this of the Buddha and his following discipeles is letting go and Nibbana. One way is that in the world, another to Nibbana. Knowing this clearly one is not a little after any gain.

(Since detail discussion is not so welcome here, and the enviroment not so proper for Dhamma Desana, feel free to raise question, even audio here.)

[Note: This is agift of Dhamma, not meant for commercial purpose or other wordily gains]