Concerning the recordings of Krsna dasa Babaji, how can I make any judgment as I have not heard them. However, you should just go on chanting Hare Krishna Mahamantra and the Pancatattva mantra and don't divert your attention. You cannot understand the meaning of the Indian songs and simply parrot like chanting of these songs has no value.
Letter to Damodara Pandita, 17 July, 1976