The best source, by far, that I have found for downloading quality isochronic tones is The Unexplainable Store.
Here is why:
First, their vastly superior quality. Isochronic Tones from The Unexplainable Store are very high quality. Guaranteed even, to induce altered state of consciousness.
At The Unexplainable Store, they create all their own Isochronic Tones from scratch.
Second, the huge variety of laser targeted Isochronic Tones, each created for specific brain wave entrainment. For example, there are specific Isochronic Tones for meditation enhancement, astral projection, inducing sleep, for anxiety, creativity, confidence, energy lift, motivation, prosperity, stress release and so forth. Each is designed to induce a specific brain wave pattern.
The fact is, that while brainwave frequencies are generally broken into four categories, Beta Waves, Alpha Waves, Theta Waves and Delta Waves, there are actually many sub-categories. The Isochronic Tones downloads from the Unexplainable Store are carefully targeted at specific sub-categories.
And when it comes to inducing altered states of consciousness, the Unexplainable Store is an absolute expert! You have got to try the laser targeted tones for Lucid Dreaming, Astral Projection and Theta Meditation. Guaranteed to work!
Third, they are very enjoyable to listen to. These Isochronic Tones are accompanied by pleasing music, water sounds, and so forth.
Fourth is the mp3 downloads are very reasonably priced.
I really recommend you check them out. If nothing else, do sign up for their newsletter and get a free 10 minute general sample that is excellent in itself. (Great newsletter too, by the way.)
I have had great success achieving altered states of consciousness with The Unexplainable Store and you will too.