The practice was stopped a long term ago. Use an internet search engine to learn more.
Learned something new today and it isn't good.
I have been in this crazy hobby for over five decades and thought I knew most of the basic information regarding audio quality.
That was before this morning.
Today I learned about the practise of applying "pre-emphasis" to CDs that was around during the late '70's and early '80's. Apparently this practise was developed as a way of reducing the signal to noise in digital audio. The problem is this was a two-part process and required the CD player to have a "de-emphasis" capability to allow the disk to play properly. Without the application of de-emphasis, cd's would sound "bright".
My question would be, "Does everyone else know about this?"
If you do, "How do you deal with it?"
I still listen to CDs and this is not something I need in my life.
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My Lumin D1 has it as well, but it is not an automated function. If you have a CD that requires "de-emphasization" you need to turn the function on in the software. I know it has stopped. My concern is that many of the best quality CDs from that era are pre-emphasized. Specifically many Japanese versions. |
@tony1954 does your CD player have the de-emphasis circuitry? If it doesn't, then those CDs will sound a little bit bright. |
Well, it was to INCREASE the signal to noise. As I recall it had something to do with the early anti-aliasing filters not being great. AFAIK, any CD player should automatically detect and enable/disable the matching de-emphasis as should most audio playback systems. However it's imperfect. According to this, it's not on a lot of CD's so maybe you don't care?? https://studio-nibble.com/cd/index.php?title=Pre-emphasis_%28release_list%29 |
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