How long do you usually loop it for? After looping it the first time, at about 45mins the feeling was noticeable for me. Then the next day I didn’t notice that much after looping for about 30 mins, except I felt it was working on blockages.
I think also it seems to work better if you are feeling great before you play it, it kind of builds on the effects of that feeling. Also, the energy is subtle so if you are in a busy environment, it is more difficult to notice it compared to being alone and meditating.