1. support wav (up to 1411 sample rate lossless), m4a (up to 400 or so sample rate apple lossless, close to lossless), MP3 (up to 320 sample rate compressed format lossy)
2. directly in the MP4 on the use of such a software I really have not heard of, the computer can be provided to you! The first thing you need to do is to get your hands on some of the best audio playback and processing software in the world, and you'll be able to do it on your own.
3. These three words theoretically ri line should not have Chinese display, the other two words should not be much difference, these three and the country line, but not in the warranty, the country line can go to the s o n y customer service repair within the domestic warranty period, the other want to repair have to be sent back to the corresponding guo home for repair.
4. owner, very happy, shake hands, our listening style is the same, I just got out of their own IE80, so I do not recommend that you into the IE80, does not meet your requirements, IE80 inclined to the classical, the specific reasons do not need to say more, truly not suitable, and the A866 can not be counted as very good match. I can introduce you to my current headphones, is S O N Y MDR-7550 (that is, Sony EX800), in addition, I change is SONY MDR-EX1000 long line, 7550 in Taobao on behalf of the purchase of the words is the price of 1380, EX1000 long line up to 500 from the forum to collect, the price is exactly the United States line IE80 price, in line with the price of your requirements. This headset I really like, should also meet your requirements, the performance of instrumental music is very positive, vocals slightly far but not serious, three-frequency balanced slightly biased low-frequency, low-frequency dive moderate. I used the IPC direct push, the raw sound is a bit cold, if the A866 push words should be better than I use the IPC direct push effect. 7550 this plug very few people know, but on the whole it is really good, change the EXK line of the 7550 if the direct push, the feeling is definitely not worse than the EXK. So I suggest you consider this plug.
Another, copy and paste the party self-respect