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Originally Posted by Gojira Ooh nice find! I wanted to find something like that. Your google-fu exceeds my own. I wasn’t disputing that anyway. I am one of the people here who wants to buy the c78 variant and I wouldn’t be considering that if I didn’t think it had the ESS+TI chips in it. Although until now I saw no official link confirming it. What I am disputing is that the A7010 is a Vibe X3 variant. I don’t think it is. I was under the mistaken impression that the Vibe K4 Note was just an alias for the the A7010, but that does not seem to be the case. I have not listened to the A7010, but I think I’ve seen them around locally.

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So I could probably listen to one to see if it sounds like the ‘nothing special’ audio from the Vibe K4 Note or something more like ESS+TI sound, but I’ve seen no evidence that it has the ESS+TI chips. There are only 3 versions on that page and none of them have the 2GB ram and 32GB flash memory combination of the A7010.

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It seems to confirm the accuracy of the devicespecifications information though. There was a full Vibe X3 with a Qualcomm SoC and 3GB ram and either 32 or 64 GB flash memory and there was a Mediatek version with 2GB ram and 16GB flash memory.

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Quote: Originally Posted by Gojira Ok. Updated my list, but I thought x900 used a custom ESS DAC. Quote: Originally Posted by eio “custom chip” is marketing language for “beta chip”, IC vendors are testing variant models and they need guinea pigs. if it goes well, it might be released as a public model. if not, it get cancelled, no big deal. fortunately, ES9018Q2C released later as a public model.

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Edited by eio – 11/23/16 at 10:05pm Reply Omg. I am starting to agree with Kyrts. This is ridiculous.

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And it gives me pause about buying the c78 because as I said the Vibe K4 Note I listened to did not impress me in the slightest. I compared it directly against a Vivo Y51 and the Y51 was much louder and more detailed and more musical.

The Vibe K4 Note sounded like lots of other normal phones I’ve listened to with SoC audio. I would not be able to distinguish it in a blind test from say an Asus. So maybe both the A7010 and Vibe K4 Note have to be included in the list as well? As separate models though.

They have entirely different specs. I would consider the information highly questionable though.

Those articles could be wrong. It seem unlikely to me that Lenovo would put the same Vibe X3 chips in so many phones.

Even the C78 seemed a bit of a stretch. How about a Lenovo web site with information about A7010 and Vibe K4 Note audio?

Edited by Gojira – 11/23/16 at 9:49pm Reply Quote: Originally Posted by GouryellaIV Not true, both X900 and X800 use Letv-HQ7A except that the X900 is AKG costumized, just saw this website of the X800 teardown and it has the same DAC as the X900 except no AKG costumization and SRS certification. That Sooma website is totally wrong, it is AKG verified.

there is no customization on sound signature going on in the 3.5mm path (which is a good thing). don’t take marketing material seriously, those things are written by marketing people who don’t know nothing about audio technology, but are masters of manipulating words.

and don’t take performance specs from smartphone manufactures seriously. because…

Quote: Originally Posted by eio device manufacturer’s spec sheet is also not much useful: even if they are honest, they only tell you a tiny part of the story – the best performing scenario, that typically means near infinite load resistance, near maximum volume, certain sample rate (48k for most Android devices) and certain frequency point (1k maybe), that is nowhere representative of the most used condition in real life. manufacturers knew what numbers are important for real world use, they just don’t want to publish them (it will look much worse, sometimes horrible compared to the ideal numbers) and there are also not-so-honest players, numbers can be faked or copied straight from IC spec, graphs can be drawn in photoshop…it’s a mess. the only thing reliable is the IC model, and please read “custom” as “unknown” when it comes to IC model.

and of course IC model doesn’t guarantee audio quality, tons of things can go wrong in hardware/software implementation and jeopardize the final output…. Reply Quote: Originally Posted by eio and those NXP smart audio ICs are speaker amps, they drive the internal speaker and maybe earpiece, but has nothing to do with 3.5mm path. Are you sure about this? I mean I know they are intended for small speaker applications, but could it not also be used for headphone audio?

If the NXP chips are speaker amps only then the amps in the x800 and x900 are a mystery. What is LeTV using to amp the headphones in those devices?

Some reports here say the output is quite loud. The NXP chip in my Flash Plus 2 is not at all loud, but those are the reports. So surely it can’t be SoC audio at the headphone jack. You know I just realized that the speaker in my Flash Plus 2 is actually unusually loud, but the headphone audio isn’t. So maybe Alcatel/Flash at least is only using it for the speakers, but it has a Mediatek SoC and Mediatek audio is mouse quiet and the Flash Plus 2 audio isn’t quite that bad. So I don’t think it’s SoC audio.

Edited by Gojira – 11/23/16 at 10:10pm Reply Yes there Quote: Originally Posted by eio it is AKG verified. there is no customization on sound signature going on in the 3.5mm path (which is a good thing).

don’t take marketing material seriously, those things are written by marketing people who don’t know nothing about audio technology, but are masters of manipulating words. and don’t take performance specs from smartphone manufactures seriously.

because… the only thing reliable is the IC model, and please read “custom” as “unknown” when it comes to IC model.

and of course IC model doesn’t guarantee audio quality, tons of things can go wrong in hardware/software implementation and jeopardize the final output…. Yes there is, the DAC tuned and partially developed by AKG, with LeTV and ESS doing most of the work as said on a press video and on the official site. Of course, what you said can apply to other phones like th G5 B O module, LG V20 with the B O ‘tuning” and Cubot Echo KTS sound.

Reply I am going to try to do a direct listening test between the Vibe X3, A7010, and Vibe K4 Note if I can. C78 is not available locally, but that Lenovo page seems to verify that it does have the same chips as the standard Vibe X3. We don’t have such verification for the A7010 or Vibe K4 Note. Edited by Gojira – 11/23/16 at 10:17pm Reply Quote: Originally Posted by Gojira Are you sure about this? I mean I know they are intended for small speaker applications, but could it not also be used for headphone audio? If the NXP chips are speaker amps only then the amps in the x800 and x900 are a mystery.

What is LeTV using to amp the headphones in those devices? Some reports here say the output is quite loud. The NXP chip in my Flash Plus 2 is not at all loud, but those are the reports.

So surely it can’t be SoC audio at the headphone jack. You know I just realized that the speaker in my Flash Plus 2 is actually unusually loud, but the headphone audio isn’t. So maybe Alcatel/Flash at least is only using it for the speakers, but it has a Mediatek SoC and Mediatek audio is mouse quiet and the Flash Plus 2 audio isn’t quite that bad. So I don’t think it’s SoC audio. sure. 3.5mm path use integrated amps (WCD9335, ES9018Q2C, etc.), or opamps (OPA1612, etc.), or specialized headphone amps (ES9602, MAX97220, TPA6120, etc.) Reply Quote: Originally Posted by GouryellaIV Yes there Yes there is, the DAC tuned and partially developed by AKG, with LeTV and ESS doing most of the work as said on a press video and on the official site. Of course, what you said can apply to other phones like th G5 B O module, LG V20 with the B O ‘tuning” and Cubot Echo KTS sound.

that’s what the marketing department wants you to believe…there is sound signature tuning in headphones, speaker path, earpiece path, digital sound effects, telephony…

but not 3.5mm path. 3.5mm path is focused on noise, drive, debug…and maybe distortion?

if that engineer is capable and having enough time and budget. AKG is involved, in verification.

it’s like a badge of honor. Edited by eio – 11/23/16 at 10:30pm Reply Geez I have Lenovo X3 Lite k51c78 and still don’t know what is inside audiowise but I do know it is a very good phone for the money I paid and SQ is satisfactory for me. Quote: Originally Posted by pandondon Thanks for answer but I want new one and I can’t find any used Meizu Pro 5 32GB in my country.

Only new ones, way to expensive. Well this is interesting, too bad it doesn’t support LTE. Price is still tempting So should I buy Ulefone Vienna or anyone has suggestion for other smartphone with very god sound quality under 200$ (LeTv doesn’t have slot for SD Card and I need slot or at least 64 GB ROM)? If you get the LeTv x800 US or “international version” it gets LTE in the US and some other countries but LeEco has dropped support so still on lollipop until they either release an update or release the sources so a developer can port Marshmallow ROMs over to us properly, most US versions also come with malware ridden software but an official lollipop ROM update from LeEco (with some bugs) can be placed on the internal storage, booting into recovery and flashing update, the CN version will get 3g or HSPA+ which is fast enough IMO and is still getting updates from LeEco, use the site below to check frequency compatibility but if you do go the x800 route I recommend the CN version http://willmyphonework.

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