Bach Fugue n 4 in C Sharp minor (à 3) has no spiritual relationship with the prelude, and, at best, suits it owing to the sharp contrast.
It has, as Spitta rightly remarks, the character of a Gigue …

Nice pace and light application of the triplet scales delicately balanced between the hands allowing for each voice to enter joyfully into the ‘dance.’

Well done, as always !

Bach Fugue n 4 in C Sharp minor (à 3) has no spiritual relationship with the prelude, and, at best, suits it owing to the sharp contrast.
It has, as Spitta rightly remarks, the character of a Gigue, and it is quite a wonderful Perpetuum mobile. The theme runs along in unbroken semiquavers; as it moves in plagal form around the tonic, having as limit above and below the fifth of the key, but returning to the tonic, it does not actually press forwards, neither does it sink downwards, but runs busily, within a narrow circle, hither and thither.
The answer is a faithful transposition into the key of the dominant, which is by no means intelligible, as the form: (without the sharps indicated above) would have been correct and intelligible (or, at any rate, the first /x need
not have been written). But it corresponds thoroughly with the hurried nature of the whole piece to fall headlong into the dominant. Again that Bach does not let the bass first come to an end, but brings in the Comes in the soprano two measures before its time, and, likewise, before the end of the close - confirmation (8 a = i) the Dux in the alto, is quite in keeping with the character of the theme, and with that of the whole piece.
Besides the theme in its original form, rich use is made of it in inversion and in that it also resembles Bach's Gigues: Of the counterpoints the most important is the one proceeding by dotted quavers and with a syncopation at the commencement; its actual form is really not the one which it has as first countersubject to the Comes (where the leap to the leading-note is only made on account of the writing a 2.
Turn on the audio and let me know what you think!
Greetings from Italy

Carmelo

This video was played with these settings:
Played on Yamaha P125 piano stage, Tamara House.                                                                                        Video Recording Samsung galaxy A54.
VST: Hamburg Steinway D Pianoteq Stage 9.0.3
Editing: Wondershare Filmora

https://youtu.be/Ykliah86aoI