Dynagroove VS Dynaflex & The Shaded Dog!

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Do you have any Dynagroove or Dynaflex records in your collection? Well guess what? You have something very special! Check out this video to find out what I mean! Also, I will explain what a ‘shaded dog’ is, and why you might want one!

*sorry for the whine sound in the background of this video. A PS4’s hard drive is on its last leg.

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Entertaining video which I enjoyed. However, you repeat a common fallacy that there is more information in the bottom of the groove that represents higher frequencies. This is not the case. The information all along the groove wall is the same and doesn’t vary by the depth in the groove. It’s the side-to-side deflections in the groove wall that produce the sound. High frequencies have more changes in groove deflections over a shorter length of groove, regardless of the depth of the groove. A completely round stylus will have more difficulty reproducing those deflections, especially when the deflections are smaller that the radius of the stylus edge in contact with groove. That’s why elliptical styli were produced, to reduce the radius along the edge tracking the groove, providing better playback of higher frequencies. They don’t sit any lower in the groove than a conical stylus, for the most part. A different way of saying it is that it fits better into the side of the groove, not the bottom of the groove. Indeed, a needle that tracks low in the groove can pick up accumulated dirt and debris, resulting in noisy playback… so you often want a needle that rides in the sweet spot somewhere in the middle. One trick for old, worn records is to vary the stylus size, so it will ride a little higher in the groove to avoid the wear that was imparted by previous playback. It’s a way to make an old record sound much better. Archivists will often do this with rare recordings they are trying to preserve.

mjanovec
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18:12 I'm a huge fan of RCA Living Stereo records (and of one of the competitors; Mercury Living Presence) and quite a few of the classical music releases can fetch high prices ($50 to $100 range) during aggressive bidding on eBay. That's why I keep an eye out for them at thrift stores, antique stores, etc. :)

TorontoJon
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16:05 Wow, I have that same 'This Is Dynagroove' record (as well as 'The Sound of Tomorrow' record) as part of my sound demonstration genre of records in my collection. I love the graphic design of stereo test/sound demonstration records as well as the music samples that are provided featuring various artists or classical music pieces, sound effects, etc. :)

TorontoJon
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Great video! Not sure if you mentioned it, but the cover of the "This is Dynagroove!" lp features a microscopic close-up image of the actual grooves of a Dynagroove record. Keep up the good work!

allthisforasong
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Just wanted to say I've found a few Dynagroove and Dynaflex hunting used records and what I've noticed is that the ones that have the anti static chemical in the vinyl are very good most of the time. Not a whole lot of dirt on them. I wash all my used ones before I play them, but the anti static ones are the cleanest that I've seen.

yodoglover
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Fantastic information and video, thank you for sharing 😀

JoeOrber
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So good to have information about stereo AND mono records. I recently wrote to another popular YouTuber about mono records and he replied, ‘they are such a niche interest’! Not in my collection!

elvisonwax
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I have one Dynagroove recording. Erich Leinsdorf and the Boston Symphony playing Brahms Symphony # 2, mono recording.
I have a mono cartridge and it sounds dreadful. It seems as if I've got water in my ears. I have several RCA Living Stereo albums and they are the best of the best. Bass, mid-range and treble in perfect harmony. There is one album that I always play when I make an improvement on my system and it's Henry Mancini and his jazz orchestra "More Music from Peter Gunn, " 1959. The recording engineer was Al Schmitt. (He was also the recording engineer on such albums as "Aja.") As far as mono recordings go, I believe that Mercury produced some spectacular discs. Sarah Vaughan, Dinah Washington, Brook Benton.

stanleycostello
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I have loads of Chet Atkins records that are Dynagroove. They still sound great.

danieldaniels
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Cool video, thanks. I have a few Dynagrooves myself including that Buick one.

paultidwell
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There's a beautiful 1963 Buick Riviera on that jacket. And it was second only to the 1971 - 1973 Boat Tail Riviera in all-time sales for the Buick flagship model. Nothing to do with analog audio, granted, but an interesting photo and historical fact regarding the Buick Riviera (on that jacket) that immediately caught my eye.

bradfordlewis
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I had a copy of the Buick Dynagroove record. I bought it for the Buick name, to the music. The car on the back is an early Riviera.

musclecarfan
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6:52 "The Sound of Tomorrow" LP is my favorite. Got it at goodwill in pristine condition.

garrettmcgillis
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RCA also used “ rechanneled for stereo “on pre-stereo albums, some classics and even some Glenn Miller & big band from 78’s

NealAmmerman
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This was a great video.Thanks for the education on these types of records. Love all the videos you show keep up the great work

michaelbuco
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On the LP, it says “RED SEAL” right on the label, under “SIDE 2”

chippe
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No thrift stores around here but we do have a sort of antique/flea market at the old armory in town. Went there today and got an album of The Fleetwoods, Paul Revere & The Raiders Greatest Hits and Dion & The Belmonts Greatest Hits for about $16 total.

Rebel
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Bravo! So many brilliant details about RCA records- I have hundreds of them and some are unbeatable. After hearing that Dynagroove records must be played with a conical stylus, I dug out a small pile from my collection in mono and stereo (I only have a handful) and gave them a spin. The stereo albums sounded magnificent - with a 2m blue! It’s hard to imagine them sounding any better and I am very fussy about distortion. I only use a conical stylus on my mono cartridge these days - mono records are way better and quieter played that way. Looking at the Buick demonstration record, I was very envious. I had it and ‘lost’ it years before I knew the significance of it. Sigh!

elvisonwax
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Great video and very informative. I can remember growing up listening to some of those RCA dynaflex LP's. Some of my dad's Elvis collection had the word dynaflex on the labels and I never knew back in the day what it actually meant. And now I know. Very interesting indeed. Great work and a very good explanation of these records. Thank you for sharing.

stephenjerome
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I have a few dynagroove albums and living stereo titles in my collection that sound great played with a magnetic cartridge and needle. When selecting a phonograph always get a unit with a magnetic cartridge and needle

gdwatts