Hi Chony,
Are these logos for promoting yourself as an arranger keyboard entertainer or to promote your studio produced music?
Either way, it's not clear (to me) from the logo what you're actually selling/promoting. When I read the words "orchestras" and "studios" it gives me the impression that you have a corporation which owns traditional classical orchestras and studios, and that your studios are traditional large sound stages available for rental in NYC or Hollywood.
That said, I prefer the 2nd logo design concept better, but if I didn't already know you to be Chony, I'd think the 2nd one looks like a company CH & NY with a treble clef stuck between the initials. That said, my suggestion is to maintain the exact same font for the "O" that you used for CH & NY, and have the treble clef design simply added on to the solid "O", but perhaps darker greyed out white to differencite it from the "O", as I believe it's important to keep all leters in your NAME distinctively separate for easy reading and to ensure easy memorable name recognition. Your name is your calling card afterall.
Just my opinion of course. Scott