Although not quite at the level of profundity of his teacher Gustav Leonhardt's recording, Kenneth Gilbert's 1983 recording of Book 1 of Bach's The Well-Tempered Clavier does have a style and polish that Leonhardt's too often lacked. Thus, while Leonhardt goes further into some of the minor-key fugues to find intellectual and spiritual depths that Gilbert does not plumb, Gilbert's playing is so much more elegant and graceful than Leonhardt's that it is difficult to choose between them. For listeners who approach The Well-Tempered Clavier as a volume of virtuoso works whose success depends on the effortless refinement of the player, the Gilbert, with its superbly remastered sound, will be the one to get. For listeners who approach The Well-Tempered Clavier as a volume of prayers written as preludes and fugues, the Leonhardt will be preferable. Both are superb and both belong in any Bach collection.
There's nothing at all wrong with Maurizio Pollini's 2009 performance of Bach's Well-Tempered Clavier, Book 1. The Italian pianist's intellectual lucidity, interpretive clarity, and technical virtuosity are apparent in every prelude and fugue, and his probing insights and penetrating analysis inform every note. However, there is almost nothing right with the sound quality of the recording. The piano sounds too distant, making it hard to hear precisely what Pollini is doing, but oddly, the ambient sound is too present, making every extraneous noise too loud. One should not hear the pedals being pressed and lifted, much less the clatter of the hammers and the twanging of the strings above the sound of the music. Worse yet, one can hear what sounds like every breath Pollini takes nearly as loudly as every note he plays. These are all grievous flaws that should have been eliminated, and their presence fatally undermines the brilliance of Pollini's performances. A reengineered version of these performances would be most welcome, but the present recording is so flawed that it virtually destroys Pollini's playing.
In his recording of Bach's 48 Colin Tilney, unlike his fellow competitors in the same repertory, plays both a clavichord (Book 1) and a harpsichord (Book 2). Why not? Bach's title for the first book of 24 preludes and fugues, The Well-tempered Clavier leaves both this issue and that of tuning wide open. The clavichord was a favourite instrument of Bach's, so was the harpsichord and the organ; indeed, I am sorry that Tilney does not include a chamber organ since some of the pieces, the E major Prelude and Fugue (Book 2), for instance, seem well-suited to it. Tilney's performance of the 48 differs again from almost if not all others in the sequence which he adopts in playing the preludes and fugues. But an apparently random approach is in fact nothing of the kind, but one that is directly linked with tuning. We know that Bach himself was a master in matters of tuning as he was in all other aspects of his craft. What we do not know is the exact nature of his tuning.
In a way, this is the best possible version of the WTC to someone who is looking for a balanced, deep and totally honest version. The harpsichord is a beautiful Flemish-French (recent research shows it is rather more French than Flemish) harpsichord (Gilbert's own) that has a marvelous sound: rich and deep, and yet bright and clear. Professor Gilbert's version is as new now as it was when it was released. It is totally respectful of the music (you won't find eccentricities, here, just the music but superlatively played). He has a very cantabile sense of the music - every voice is respected - and his Bach is phrased almost as a dance, rather than as gesturing. He seems to belie Leonhardt, when the Dutch says that the piano was meant to sing and the harpsichord to speak; in Gilbert's hands, it really sings). Do not expect strong chords, abrupt contrasts or anything like that. Gilbert's version is for the connoisseur rather than the Fireworks enthusiast. If you examine, in detail, the way he plays, you will find that every voice is subtly sung, that the amount of work and serious thought he lavished into Bach's music is prodigious.