Eyyy, thank you!Found this for Future Tone on GFAQs:
List of songs with Multi Voice Tracks?! - Hatsune Miku: Project Diva Future Tone - Colorful Tone
For Hatsune Miku: Project Diva Future Tone - Colorful Tone on the PlayStation 4, a GameFAQs message board topic titled "List of songs with Multi Voice Tracks?!".gamefaqs.gamespot.com