Strict technically, the 4:th prelude is one of the easiest compositions. No doubt about that but musically...I have heard many versions of this prelude, at least 20 and they differ a lot. To be able to play Chopin, you need to know a lot about him, how he acted as a teacher, how he intended his music to be played etc. I did collect some info about his advice to student which shares some information.
- Every pupil, however advanced, should study Clementi's Gradus ad Parnassum.
- Right hand should be places on the notes E, F#, G#, A# and B. Left hand should be placed on C, Bb, Ab, Gb and E. These positions help rapid performance of scale passages.
- Hands should be held quite flat.
- C major is the most difficult scale to play well. Let us begin with with the scale of B, Gb and Db which tends to place the hand naturally, long fingers for the black keys.
- Chromatic scale should be practised with the thumb, forefinger and middle finger.
- Use pedals most sparingly, at least in the beginning. And even later on.
- Compositions used by Chopin for instruction: Works of Beethoven, Hummel, Field, Dussek, Hiller and Scarletti. To study music: Bach, Mozart and Händel.
- Listen to great singers. From them you learn how to phrase. Beautiful sound is the secret.
- Practise three hours a day is enough.
- To lift your hands in the air is undignified: it is "catching pigeons".
- A clean, even staccato helps to develop a clean, even legato.
- Rhythm: The left hand should act like ac orchestra conductor...It is the clock...Rhythm must not be violated.
- Always practise on a good piano, not a second-rate one.
- Interpret your own way, as long as you do not change what is written.
- Rubato is for the right hand and should be restricted to a single bar or a melody figure but for where the rubato resides within the marked dynamics. The Mazurkas are the excpetions.
- Do not play unnecessary loud or over-virtuostic. It will ruin the beauty.
- Do not strive for equally powerful fingers. The fingers are different in shape and function and have different tasks as for example, the middle finger creates the most beautiful voice. Therefore, the marks of fingering must not be changed as it will violate the phrasing.
- Learn a few Preludes and Fugues from Bach's WTK. They will automatically get your fingers right and use them as warm-up exercises before a performance.
Not all of the above apply to the topic but a few things about tempo and rubato can be learned. There is a reason he stopped marking his score "rubato". You will only find this in his earliest compositions.
What I dislike most about different interpretations with Chopin is over use of tempo rubato. According to what I have learnt, Chopin's music is more "baroque reincarnated in a romantic form" compared to his contemporaries. Frankly speaking, follow the metronome and you might be suprised to learn that he never let his metronome escape his piano.
But despite all the above, I think the most important thing for a pianist is to follow his/her heart. Don't try to be someone else or play like someone else. Collect inspiration by studing the composer and pianists interpretations carefully and use this information to find your own path.
I used to listen a lot to what people thought about my playing but I tend to listen less these days when I only play for fun and to keep my mind off the work.
My interpretation of the 4:th prelude is like a photo from this very day. A moment caught in music and if I record it again, most likely, a different version will come out but you will still hear it is me.