it is a common misperception that digital noise reduction [sonic solutions NONOISE, CEDAR et al] per se, "harms the music" - it ONLY does so when it is misapplied by a cloth-eared ham-handed audio restoration technician. having used these tools for 3+ decades now i can tell you that they are godsends for musical enjoyment of crackly hissy rumbly old phonograph recordings esp. those on 78. this rant out of the way, i can say that it is the ART of recording and not just the TOOLS of recording that matters more in terms of sound quality. i've heard well-done dolby A recordings that had just as much "air" as ones made a few years before dolby A came on the scene. ya just gotta do the job right in the first place.
Why recordings made before 1965 sound better.
I’ve brought ht up this topic before, and I believe my point was misunderstood. so, I’m trying again.
Many A’goners have commented that recordings originating in the late 50’s and early 60’s which have been transferred to CDs sound particularly open with better soundstaging than those produced later.
Ray Dolby invented his noise reduction system in 1965 to eliminate what was considered annoying tape hiss transferred to records of the time. The principle was to manipulate the tonal structure so as to reduce this external noise:
“The Dolby B consumer noise-reduction system works by compressing and increasing the volume of low-level high-frequency sounds during recording and correspondingly reversing the process during playback. This high-frequency round turn reduces the audible level of tape hiss.”
‘Dolby A and C work similarly.
I maintain that recordings made prior to 1965 without Dolby sound freer and more open because the original tonal structure has not been altered and manipulated.