The registration memory is likened to a "Scene" found in the older Yamaha synths. It memorizes all the Panel settings (snap shot) including the Mixing Console settings.
From the FAQ document found here:
https://psrtutorial.com/lessons/faq/PSRFAQ.htmWHAT COMMANDS OR INFORMATION CAN BE SAVED IN A REGISTRATIONThere are 10 commands that can be saved to most PSR series of keyboards, and 11 in some Tyros series keyboards. The list includes:
1. Song (midi file link)
2. Style (onboard or User)
3. Voice (onboard or User instrument voice(s)
4. Multi-Pad (onboard or User)
5. Harmony (Instrument voice(s)
6. Tempo (style)
7. Pedal (functions you wish your foot pedals to perform when activated.)
8. Transpose (Master, Song, or Keyboard)
9. Scale (tuning scale of keyboard)
10. Mic Setting (All microphone settings)
Joe H