The important thing was I read somewhere that 432 Hz music is better for the body and the soul. It may be a myth. However, on reading that, I looked for 432 Hz.music and found meditative videos and used them.
They also say, some people enjoy benefits of 528 Hz music as well.
I do not mind the mythical hypotheses about these two frequencies. Whatever floats my boat i.e. puts me to sleep, is OK. If there are true healing powers associated with these, fine. Icing on the cake.
I enjoy Celtic music and American Native Music anyhow, so, I will keep on using them to get to sleep.
I also checked my sleep pattern and found out that I had at least two solid hours of deep sleep. That truly is great because, I was not getting any deep sleep lately.
I will keep on experimenting.