One might try to answer what type of memory is there associated with playing music.
[Types of memory]
Conscious: Visual and logical observations of the sheet music and keyboard that aid sight reading and encourage Muscular memory.
Muscular: Producing a group of notes with a relaxed movement of our hands.
Sound: How the sound in our minds eye effects muscular and conscious memory.
[Observing pattern] Conscious, Muscular and Sound Memory
See, hear and use pattern observation in music to improve sight reading, memory and performance of a score. How to one drill a passage of music mindfully instead of brute force repetitions. How to mark/highlight/color and section sheet music to highlight observations.
[Using building blocks of music] Conscious, Muscular and Sound Memory
Knowledge of the building blocks of music including; scales, chords and arpeggios and how to observe their pattern, shape,form and sound. How observing pattern allows us to learn more of the piece simultaneously.
[Listening to ourself and others] Conscious, Muscular and Sound Memory
Observations made when listening to how ourselves and others express music. How to listen, assess, take note of and make changes to what we are producing while playing.
[Hand movement and rest] Conscious and Muscular memory
Understanding when the hand has to move and when it should remain about a single position. We will term these as “Movement Groups”. Manipulations of controlled pausing in between movement groups to practice “difficult” sections. Coordination issues such as syncopation (x notes against y), rhythmic accenuation, phrasing etc.
[Reading music] Conscious and Muscular Memory
How to read sheet music and how to make improvements to speed, accuracy and “difficulty” of what we can fluently sight read.
[General knowledge of piano] Conscious and Sound Memory
An appreciation of major classical composers for the keyboard (Bach, Beethoven, Chopin, Liszt etc) and various piano styles (Baroque, Classical, Romantic, Jazz, Blues, Ragtime etc). How a piano is built.
[Discipline and organization] Conscious Memory
How to increase your rate of learning, knowing ones technical/musical strengths and limitations, how to set long, medium and short term goals. Estimating the time it takes to memorize a piece and measuring/increasing your memorization rate.
[Physical posture] Muscular Memory
How one sits at the keyboard and the various positions for our hands. What is an efficient technique and how do we improve our technical efficiency. The logic behind fingering choices.
One could probably add some more but I find these are the main ones which exist at all levels of piano playing.