• --A longer record album means skinnier grooves, lower playback volume and more noise.

• --The big vinyl revival might actually be a lot bigger -- SoundScan doesn't track sales of used vinyl, long the domain of crate-diggers, vinyl newcomers and flea-market collectors. 

• --Selling more vinyl records means making more vinyl records — not an easy task for an industry now straining to scale up to the current boom. According to many estimates, there are less than 20 major record pressing plants in the United States, and not many more abroad.

• --Buying vinyl records today is the only way to buy music that will give you a return on your investment. You can’t resell a digital file, and CD's are largely worthless to the secondary market. Vinyl records — new or old — retain healthy value if in good condition. And, you can make a profit by selling a scarce or hotly-desired LP. Record collecting isn’t a path to a dream retirement, but if you had to, you could sell your collection.

• --Colored vinyl is aesthetically attractive, and can be highly collectible, because colored vinyl is produced in limited runs. But audiophiles strongly prefer black vinyl, because the carbon black added to the plastic used for pressing makes it slightly more durable.

• --New reissues of old albums on vinyl are often made from the most recent CD of the title because the record label does not have access to the original analog master. If you have the option of finding an original vinyl pressing of the album, you should, or check online to see if you can learn the source material used for the vinyl reissue. If you simply want to have a particular album on vinyl and a new reissue is your only option, just go for it.

• --The Beatles legendary, culture-changing 1967 album “Sgt. Pepper” was not the largest selling album in the U.S. that year, “More of the Monkees” was. Another legendary LP, The Beach Boys 1966 masterpiece,“Pet Sounds,” was not certified gold until the year 2000.

• Brian Wilson munching on a vinyl record, perhaps frustrated with the slow commercial acceptance for "Pet Sounds"