One of the things I've personally enjoyed using on and off in the mornings, in this 40hz space, is: https://mynoise.net/NoiseMachines/forty40HzBrainwaveGenerato

One of the things I've personally enjoyed using on and off in the mornings, in this 40hz space, is: https://mynoise.net/NoiseMachines/forty40HzBrainwaveGenerator.php https://mynoise.net/NoiseMachines/forty40HzBrainwaveGenerato... Mynosie generally has a lot of neat noise generators in this brainhacking space