Switched-on Bach is a revelation in part because the synth bass tones are more focused, distinct, and identifiable than when the same notes are played on acoustic instruments — allowing you to hear harmonic interplay which I believe is closer to what Bach heard in his head.

But here are lots of Bach synth albums and only Wendy Carlos’ work has the taste and obsessive fidelity to the original compositions to allow those ideas to come through. Most synth Bach falls into the trap of being idiomatic synth rather than idiomatic Bach, akin to playing Bach on the piano without considering how it would have sounded on the harpsichord.