FOCUS AMP Pure Tones Edition
Pure Tones Edition - Just the isochronic tones and nothing else. While the effectiveness of entrainment is very high with Pure Tones, some may find them unpleasant due to their monotony. Therefore, the volume should be chosen that way that the tones, while audible, are not heard loudly.
DEMO
FOCUS AMP 12-20Hz Pure Tones Edition