He did engineer so many classic jazz recordings. Unfortunately, some of his remasters weren't all that great. I found some of them to be rather muddy sounding, which is why I usually go back to the original records. But you can't argue his contributions to jazz over the decades.
I've always thought that, being a person who likes crisp highs in recordings. I remember way back when - we were discussing WE AND THE SEA by Tamba 4. I was never able to find that LP, but like others, was surprised that it got a CD release in Japan back around 1998 or so. While I was thrilled to finally hear the album, it sounded a bit muddy to me.
Then, just a couple of years later, Verve By Request reissued it in the US. This one sounded much better to my ears.
Many of those CTi recordings are muddy. I forget which frequency it was, but I used a parametric equalizer to notch out a small bit of the midbass and it really cleaned up the sound. It wasn't much--just a decibel or two--to clear it up. Some recent masterings reduce that murky sound, thankfully.