I remember reading that Aleksey liked the songs that the solders sang. he also had a perfect pitch and played the Russian folk instrument called 'balalika'. I'm sure he heard classical music, but I'm not so sure that things such as rag-time and tango were heard inside the Imperial Home. I'm sorry for sounding close-minded here, but I can't see either Nikolai or Alix allowing their children to listen to that.