Certainly possible and even necessary. As a result, You accumulated a good connection between Your "efforts" and the corresponding state of the brain and You can very effectively enter into these States without cars.by the Way the question to Andrew. Is it possible your discs or the built-in session combined with autotreninga will not be is at once too great a strain on the heart, the head, the nervous system and the organism as a whole?
Sound and light training can also be combined with mantra-meditation and prayer (somewhere I read that the Vatican has officially approved this practice). As a result, You will have access to the corresponding States in any place and at any time by simply closing your eyes and repeating a mantra or prayer.