It seems that a lot of has something to do with my mood too, also humidity seems to make a difference on the sound. I will give Silk and Steal strings also a try.
Perhaps I have become too sensitive to sound 
What are the strings in it now? The MP3 sounds tinny, like the strings are the problem to me. Also have you had it set up, or checked the set up? It is almost like something sounds wrong with the three high strings, the lower strings sounded ok to me.
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After listening to the recording, I am wondering if the truss rod needs to be loosened. I think Iâm hearing buzzing on the thinner strings.
Just this week, I had to loosen the truss rod on my Martin GPCX2 (a Martin that is even cheaper than yours), and it sounded similar before I made the adjustment.
In my case, the winter heating season has started here in Canada, which often dries out the wood in guitars, and requires an adjustment. Have you turned on your heat due to colder weather recently?
The default setup was not good at all so I used trust rod and lowered the action. everything is fine when the humidity is 55 or above but when the humidity is 40 very little buzz I have on a higher string. ( I can manage that )
The string is the one that comes with Martin. Medium 13 MA550T authentic acoustic
I bought a new set but the same string so I do not have to play with trust rod again
but this time I am going to change it to silk and steel string and test the sound
As I come from classical guitar silk and steel string might suit better and change my mood
Thanks, guys for the suggestion.
Nice playing, I thought the sound was okish. Hard to tell from an audio. Not as rich sounding as one might expect. Maybe my expectations were low due to the previous comments about this guitar.
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I play an older guitar and I have come to learn that the type of strings, guage and even manufacturer have a good deal of effect on the sound. As does humidity. I think some if the suggestions of previous posters have given good advice. I donât think your D10 will ever sound like a D28,but I think you can improve the sound a great deal with trying different string types and watching the humidy of the guitar. Hoping you love it again.
Hi there,
I have a Martin guitar and I really love the sound for what I paid for it. I have a Martin X style guitar. If you look at the ârecord yourself playingâ posts here, you will see me playing that one more often than any other guitar I have. The version I have is made in Mexico. The US built ones are a little out of my price range at this point. Someday. Martins are just as nice as Taylor in my opinion. I have played both and both are high quality.
Jeff
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Silk and Steel strings are very good, I use them on my cheap parlour guitar to give it a warmer sound, but make sure you check the set up because they have a lower tension so would possibly be closer to the neck causing string buzzing.
My Acoustic is a Freshman Apollo 40CE, itâs all solid wood and it cost me just over half the price of your Martin, I exchanged a Taylor 214CE deluxe for it; everyone who has heard it has said it sounds much better than my Taylor despite being smaller and a lot less money new.
My advice next time, maybe try a high end Epiphone or Sigma if theyâre available to you and see what your opinion is!
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Those strings are dead.
You probably already know this, but when you change to silk & steel strings youâre almost certainly going to need to adjust the truss rod again. Iâd expect the silk & steel strings to be lower tension; the guitarâs neck relief is very likely to change.
When youâre judging an steel string guitarâs sound keep in mind that theyâre different beasts from classical guitars. A classical guitar doesnât need to deal with the high tension of steel strings, so it typically has a lighter construction and bracing. This tends to make classical guitars very resonant and projecting. Steel string acoustic guitars, with their less resonant sound boards (due to the heavier construction and bracing) often make up for this by being physically larger, and also by often being played with a pick. (Although there are also steel string guitars that are mainly intended for fingerstyle; these tend to be smaller than dreadnought size, and less heavily braced.)
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Itâs only one data point, but when we swapped in Silk and Steels on my girlfriendâs acoustic, no truss rod adjustments were required.
And the guitar became noticeably easier for her to play. Sound was a little less bright, but the trade off was well worth it.
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Yeah, it depends on the specific string gauges. I was thinking of silk & steel strings as being a light, low tension set (compared to the Martin Mediums that he has), but I suppose one might find a set of silk & steel strings that are medium gauge and that have a similar tension.
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I will gladly take that horrible Martin D10E off your hands for $100 LOL! 
As someone who is struggling to get together $200-$300 for an accoustic such as the Yamaha FG800, I hope to one day be able to call a $1000 guitar cheap.
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Yeah, any guitar that costs $1000 may fall in the âcheapâ half if the price of each and every existing instrument is considered, but in itself, I wouldnât call any instrument (guitar or whatever) with that price cheap. Sure, there are ones 5 or 6 times or even more expensive, but price is only one of the potential guarantees for quality.
Like, a Rickenbacker 12-string electric guitar would probably be the âcrown jewelâ of my guitar collection and I wouldnât need to think about getting another guitar until the day I die. It costs about $3000 (plus shipping costs and the time you have to wait for it to arrive) but it has more than 3 times the amount of wood and other parts in it than a Martin acoustic. Does that make it cheap? I really donât know the answer to that. From my perspective, itâs freaking expensive.
To OP, try if some of the suggested remedies work and improve the sound of your instrument. If not, then either sell your current steel-string acoustic and get a different brand/model of your liking, or stick to nylon-string classical guitars if you prefer the classical tone.
Besides experimenting with strings, may I also suggest you investigate and experiment with how you actually play it. Acoustic guitars are very sensitive to which pick you use (primarily how thick and stiff it is) as well as how hard and where on the guitar you play. If you pick too hard and a bit too far back, towards the bridge, then the overall tone will be sharper. Pick a bit softer, a bit more towards the sound hole and the will soften up. Significantly!
This is not even talking about how you actually recorded the guitar in your sample clip, which in itself can hugely affect the tone⌠Essentially we cannot know how you hear the guitar âin the roomâ. Unless you tell us you hear it sound pretty much exactly like in that clip of course 
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Guys I understand your points but the quality control is not good look at this picture.
This is guitar is only 3 months old and when trying to change string I discovered this on the fret
Is this normal? is this done by the factory for intonation or any other purpose?
What is weird about that is that there is significant fret wear on a 6 month old guitar. I thought you bought it new?
This is my 10 year old guitar.
Yes this is a new guitar. I can see I am not alone
Man I hate this
Makes me glad I never bonded with a Martin guitar.
I would agree that that is unacceptable. I doubt Martin Guitars would help you.
How adventurous are you? It isnât that hard to crown frets. You can even replace them yourself, but that is a pain.
I would imagine that crowning them would be very temporary. Replacing them would cost as much as you would lose trading it in and the bad blood would remain.
Cut your loses. Trade in to a better guitar.
Yes that is why I am upset at Martin read this one