Some White, Brown and Pink noise sessions I created some time ago. All tracks speed up at the end to bring you to a more alert state. The relaxation ones go down to Alpha and the meditation ones down to Theta.

Brown Noise - Meditation - 20 min.mp3
Brown Noise - Meditation - 30 min.mp3
Brown Noise - Relaxation - 20 min.mp3
Brown Noise - Relaxation - 30 min.mp3
Pink Noise - Meditation - 20 min.mp3
Pink Noise - Meditation - 30 min.mp3
Pink Noise - Relaxation - 20 min.mp3
Pink Noise - Relaxation - 30 min.mp3
White Noise - Meditation - 20 min.mp3
White Noise - Meditation - 30 min.mp3
White Noise - Relaxation - 20 min.mp3
White Noise - Relaxation - 30 min.mp3

https://btcloud.bt.com/web/app/share...98b5a331b40832