I was listening to PS tapes to see if I found any PS that hadn't been included in the site yet. 

Then, I heard a few songs sung one by one by one Indian brother and one western sister. The sister was singing with instruments in a western style arrangement whereas the Indian brother was singing alone in Indian style. I had never heard these songs before. The Indian style ones were more complex but the western style ones more musically beautiful. 

Then, one person (who looked like a brother that I sometimes see on Baba photos from the time when Baba went to the snowy mountains of Switzerland) told that Baba had said that if one sings this song (the one sung by the Indian brother), one will feel warm even in very cold places.