You're obviously not 100% satisfied with your Preamp and/or CD Player so, either get a CD Player with a tubed output or a tubed preamp??
What do you mean by add "musicality" to your sound???? And, why do you think a tubed volume control will add it??
What do you mean by add "musicality" to your sound???? And, why do you think a tubed volume control will add it??