There can be several reasons, but most likely, a poor job of engineering and transferring (remastering) the old studio master tapes. CD is capable of wider dynamic range than LP, so recording engineers make a new master tape when an older album is released on CD. Because of the digital format's wider dynamic range, it is also capable of highlighting defects and deficiencies of older recordings. If the engineer does a poor job of remastering a well made studio master, that also shows up in the way the CD sounds. I have a massive collection of LP's and CD's, and there are indeed a lot of remastered CD's that sound worse than the LP. Also, if the original master wasn't well engineered (I've heard a lot of those too), then there is only so much that the remastering engineer can do to resurrect it.
A lot of music lovers prefer the sound of vinyl to CD, but I prefer the sound of CD over vinyl the vast majority of the time.
A lot of music lovers prefer the sound of vinyl to CD, but I prefer the sound of CD over vinyl the vast majority of the time.
Oklahoma State University--The University of Oklahoma!--GO POKES!! GO STATE!!