I judged the firmware and see that there is check the firmware date. If you remove this line, you can flash the firmware and the old. And since the installation process completely, and firmware update is digitally signed, it is absolutely safe. And I do not understand why there is no desire to...

In playback mode via Bluetooth volume control does not work.

I agree with the comment above. The ability to roll back to an earlier firmware is very important. To do this, nothing much else to do , simply delete the build date verification string

Yes, I understand what you are saying and you are right of course. I do not want to Root your device (for this to begin with at least a third party should be put recovery example twrp 2.8). I understand what android and how it works (from 2009 on it since version 1.6 and was once even the...

Well, yes, I understand you. I opened the firmware file and saw that the "update-script" file at the beginning of the line, where there is a check device name and version of the build (date). This line can be removed, but then you have to re-sign the file with the firmware to be able again to...

Help is needed! How to downgrade the firmware to version 1.8 ( the Chinese ) to version 1.5 ( international ) ?

Make that after removing the song playback does not stop, but continued playing the next track. Thank you!

This starts the amplifier.

Thank you very much for the detailed answer to my question. Everything is clear. I certainly understand that to fulfill every whim of the user (if it is not the wish of a large number of users of the product). Yes, I certainly can use third-party software players from Google Market. Just as...

I described the case that I would like to see in the ideal implementation. In another it is generally called a "queue", see the program as an example of Neutron. You will understand the algorithm, there is even possible to make a dynamic queue (if the file to listen to, it is automatically...

I have tried this option does not work. playlist file even threw in on the Android folder \ Data \ com.cayin.music.i5 \ files \ playlist does not work.

I understand what you're saying . But understand , these folders are dozens and they are all in different places . If, for example their folders 20-30 , then I sit and poke 10 minutes collecting my playlist ? It is very uncomfortable.

You do not quite understand, I will try to explain in another way, for example: The file structure is shown here, the hierarchy tree:   Music      - Folder 1            -- Folder 1.1                    -- Track 01.flac                    -- Track 02.flac                    -- etc      ...

I appeal to the representatives of the Cayin. Make please in the next firmware is the ability for the long tap on the folder to select "play folder". I highly recommend. For example I have a root "Music" folder, in it two folders "FLAC" and "MP3" (Yes, not all songs can be found in lossless...

About the volume control I see it now, Yes you are right, still depends on the speed of rotation. I give your word users are from Russia. About DLNA , files cannot be downloaded directly to the player. Now playing on DLNA all great, but the menu option "download" is not working, nothing happens.