stuttering music

zbyszkoo · 05-13-2008

the reason it stutters so much is that each file has a cover in its tags. and these images had 1200x1200 pixels.
I've removed all of them, and id3v2 tags and I dont have stuttetring.

But it's so annoying...

The Torminator · 05-21-2008

Quote:

Originally Posted by Reborn[Tai]

thanks for the contact with meizu
one thing that make me surprise: HOW COME THEY EVEN DON'T KNOW ABOUT THE SHUTTERING PROBLEM?

They do! unfortunately since "Whatakevin" did contact them (at least).
First time I did contact them they said this:

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"Dear friends,

Thanks for your email and consideration.

We know that you are expected to the new FW to solve this problem.
In fact, we are so sorry about that. Currently we haven't got any solution.

The problem is caused by the low quality of MP3 songs.
As we all know, Mp3 is a digital audio encoding format using a form of lossy data compression.
So some of them have stutter issue error in M6 models.
Therefore, we hope people to use FLAC, APE, WMA LOSSLESS, etc lossless compression. They are pefect and very nice!

Meizu emphasis on people foremost. We will ameliorate In our coming product ranges.
Would you please give us some MP3 resources caused stutter issue error?
Your kindly cooperation will better our test in new products.

Thank you and best regards,
Yankee Chan
Meizu Technology Co., Ltd"
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Since then I have talk with Yankee a few times. In that here is a little summary of what he did say to me from now:
I hope this will make you better understanding the situation.
(Oh I did gave him all the song or links you did shared here in the previous posts AND the tip from you "zbyszkoo" about removing the tags and album arts. He found that very useful. I think is could maybe be like a key for them to find the problem faster)

"Hi The Torminator!
thank you very much for you help.
We have not got any soluction to solve this problem. sorry~~
This problem is caused by the low quality of MP3 songs. So we hope people to play some high quality songs, for example FLAC, APE, WMA LOSSLESS, etc lossless compression. Any way, thank you very much for your support. The songs with stutter issue is very useful. It's better for us to test the coming Meizu products.
We are expected to solve this problem in the coming new range products! If you have question, please contact with me in any time. "

"Hi The Torminator!
your advice are very useful! i have download the album. (The slip album - Nine Inch Nails) all of the album and your advice will be pass the our R&D department. our progress is base on your support! thank you for all Meizu fans!!! our new product mini one mobil phone will be released on September. Hope you will be interested in it. Have a nice day!"

Yankee Chan
Meizu Technology Co., Ltd"
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That all for now. I still talk with him right now!
I will report some more news if I get some.

nvit · 05-22-2008

"The problem is caused by the low quality of MP3 songs."
- That is definitely a rubbish.

DaremoS · 05-22-2008

Quote:

Originally Posted by nvit

"The problem is caused by the low quality of MP3 songs."
- That is definitely a rubbish.

Unfortunately it's not...

What we have stated since the very beginning of this stuttering problem is that one of the many causes of this bug is the use of old MP3 encoders... please search in related threads and you will find that I wrote something about it (sorry I'm a bit lazy and annoyed / disappointed with this issue to search by myself).

Among many other reason that trigger the stuttering, that, mentioned in the answer, is one of them... but the big truth is that MP3 decoder used by Meizu in M6 and M3 (It's a PHILIP UDA1380HN stereo audio codec) or maybe the link between this decoder and the processor was badly designed. This codec is simply failing in managing of MP3 with some imperfections or extreme encoding (for instance, MP3 with embedded cover art) and it's not capable of compensate this situations as a normal PC MP3 decoder does.

There never is a stuttering problem when music is encoded by the user and transferred to the Meizu device (except if it's used a strange encoder). Mostly comes in files shared from others thru the net and finally mounted in Meizu devices.

I repeat... the MP3 decoder used by Meizu is faulty and limited... by this reason I think that this problem will never be solved... the only hope I have is that this MP3 codec never be used by other Meizu player... because result will be the same.

adamL · 05-22-2008

i hope this mp3 decoder will not be on the m7! probably it will on the m8 because j.wong said that the m8 audio quality will be like the m6.sorry for my bad english.

The Torminator · 06-25-2008

Quote:

Originally Posted by DaremoS

Unfortunately it's not...

What we have stated since the very beginning of this stuttering problem is that one of the many causes of this bug is the use of old MP3 encoders... please search in related threads and you will find that I wrote something about it (sorry I'm a bit lazy and annoyed / disappointed with this issue to search by myself).

Among many other reason that trigger the stuttering, that, mentioned in the answer, is one of them... but the big truth is that MP3 decoder used by Meizu in M6 and M3 (It's a PHILIP UDA1380HN stereo audio codec) or maybe the link between this decoder and the processor was badly designed. This codec is simply failing in managing of MP3 with some imperfections or extreme encoding (for instance, MP3 with embedded cover art) and it's not capable of compensate this situations as a normal PC MP3 decoder does.

There never is a stuttering problem when music is encoded by the user and transferred to the Meizu device (except if it's used a strange encoder). Mostly comes in files shared from others thru the net and finally mounted in Meizu devices.

I repeat... the MP3 decoder used by Meizu is faulty and limited... by this reason I think that this problem will never be solved... the only hope I have is that this MP3 codec never be used by other Meizu player... because result will be the same.

I did ask Y. Chan about this if there might be something about it.
Here is the reply - let me know what you think about it.

"Hi The Torminator!
Today I check with the main engineer. Here I'd like to tell you two status:

Firstly, the decoder has two ways to decode.
One, when face the MP3 with some imperfections or extreme encoding, it will miss them, start with the coming perfect encoding. The faulty encoding is too little to be recognise, so you won't hear the difference by your ear.
Two, when face the MP3 with some imperfections or extreme encoding, it will manage them. But mostly it will failed to do it. So you will hear the stutter. M6 and M3's decoders are the second one.

Secondly, the MP3 with stutters has imperfections or extreme encoding at the end. It is the problem of itself.

Suggestion: use a audio converter, to convert the faulty songs to MP3 format again. Maybe the encode will go on well after being converted.
Hope you will try our suggestion. Of course it is only an advice, we need to test it also. I will ask somebody to test the song what you send to me later."

BobbyQ · 06-25-2008

I do not understand a word ..

Astradam · 06-25-2008

Something about..the decoder in M8 will skip imperfections (or you wont hear them), and the M3/M7's decoder will try and play imperfections, but its a useless attempt and it creates stutter?

Maybe?

The Torminator · 06-26-2008

Quote:

Originally Posted by BobbyQ

I do not understand a word ..

Me too
in several ways
If we need to reconvert our music to solve this problem, it will be a slightly lose of sound quality. And thats..

DaremoS · 06-26-2008

Quote:

Originally Posted by The Torminator

Firstly, the decoder has two ways to decode.
One, when face the MP3 with some imperfections or extreme encoding, it will miss them, start with the coming perfect encoding. The faulty encoding is too little to be recognise, so you won't hear the difference by your ear.
Two, when face the MP3 with some imperfections or extreme encoding, it will manage them. But mostly it will failed to do it. So you will hear the stutter. M6 and M3's decoders are the second one.

In my opinion this confirm my worse speculation:
in one: the good will sound good, those that are faulty but too little will be decoded but user won't notice the difference (as the MP3 decoder will manage the error) this seems to apply to any decoder, for instance a PC decoder.

in two: the decoder will manage them, but it will fail and then the user (you) will hear the stutter. This is the situation of M3 and M6.

Then you have to recode the files which stutter

Philips audio decoder used by Meizu is not capable of do option one.