Compressed vs. "Remastered" CDs


Hello all. I am a music lover but not an engineer by any means. Can someone explain what a "remastered" CD is, and if that term necessarily or usually means the analog signal has been compressed or rounded-off, over-digitized, etc. There are many remastered CDs that I think sound better than the early 80's releases, but I have read some negative articles about the remastering process. By the by, why do certain CDs, such as Beck "Sea Change", for example, sound cleaner and sharper than others? Can anyone enlighten me?? Thanks.
klipschking
"Remastering" is a catch-all term that covers a wide range of possibilities.

For some recordings, it may mean the original multi-track recording was re-mixed. Each individual track may have its own EQ and other effects applied uniquely to that track. The balance and mixing between tracks is done fresh. Compression or dynamic alteration that was used on the original LP may not be used on the current version or applied more subtly.

In the hands of a good producer and engineer, a remastered CD can be a dramatic improvement over the original release.

However, remastering may mean nothing more than the original final mix being tweaked, or the bass boosted, or "sweetened" just a bit. Sometimes this is an improvement and sometimes not.

At the bad end of the stick, a remastered recording may be nothing more than another victim of the loudness wars with a lot of compression and dynamic limiting added in order to push up the apparent average volume. If this is the case, the original recording will be preferable.

As you can see, the term "remastered" is virtually meaningless by itself. Each remastered project has to be looked at by itself to see if it is truly an improvement or not.
Nice summary m1sst1!

My uncertainty is whether most CDs are being remastered these days strictly with the "loudness wars" as the driver. If so, that is not a good thing from a sound quality perspective.

However, remastering can be done in an unlimited number of ways in order to achieve other sound goals as well. Not all CDs that are louder on average are necessarily compressed or limited.

It is possible to remaster with the result of greater average loudness without either of those things if desired.

So to me, a louder CD does not necessarily infer lesser sound quality. Certain things that were mixed at too low a level originally may just be brought to a higher level to achieve perceived better balance.

Remastering is an art as well as a science. Its like all the fancy enhancements one might do to a single high quality digital image to emphasize the details or features you want to though perhaps also at the expense of other details or features, or not.

The ability to remaster is a great thing potentially for audio and music lovers. The potential to abuse it of course also exists. I think there are a lot of very good recent remasters with higher average loudness out there as well as those very common others where all or most dynamic range is lost.

For example, a good remaster of a solo classical guitar piece might be much louder overall, but the dynamic range still actually improved in a manner that enables transients and harmonic overtones that did not stand out prior to do so now. It could be overdone, done just right , or just miss the boat totally. It's all up to the producers. They can produce an enhanced work or art or chose to butcher it at will in ways that were not possible years ago before modern digital technology.

Use technology or abuse it? That would seem to be a big part in general (not just in audio) of what makes the world go round!
Using compressed cd's may reduce sound quality, specially if the compression method is Lossy audio compression.