1. supports wav (maximum sampling rate 14 1 1 lossless), m4a (maximum sampling rate is about 400 lossless), and maximum sampling rate is 320 lossless).

I haven't heard of this kind of software directly used on MP4. The computer can provide you with foobar2000 software and professional audio playback and processing software.

3. theoretically, there should be no Chinese display on ri bank, but there should be no difference between the other two. The difference between these three companies and Bank of China is the warranty. During the domestic warranty period, Bank of China can go to s o n y customer service for repair, and other repairs have to be sent back to the corresponding Guo Jia for repair.

4. Landlord, I am very happy. Let's shake hands. Our listening styles are the same. I just gave up my IE80, so I don't recommend you to join IE80. It doesn't meet your requirements at all IE80 tends to be classic. Needless to say, it's really inappropriate, and it doesn't go well with A866. I can introduce you to my current earphone, which is S O N Y MDR-7550 (that is, Sony EX800). In addition, I changed it to Sony MDR-EX 1000. If you buy it on Taobao, the price of 7550 is 65438+IE80, and the price of EX 1000 is at most 500 from the forum, which is just right. I like this earphone very much, and it should meet your requirements. Very positive about instrumental music, with a slightly distant voice but not serious. The tri-band equalization is slightly low frequency, and the low frequency dive is moderate. I use IPC to push directly, and the sound is a little cold. If I push directly with A866, it should be better than if I push directly with IPC. Few people know about the plug of 7550, but overall it is really good. If you push the plug of 7550 directly on the EXK line, your hearing is definitely not worse than EXK. So I suggest you consider this plug.

In addition, copy and paste the party's self-esteem.