It is not possible to assume the situation of playing through DAP. As for the supported range of firmware, if you change the OEMID that appears when you run ConfigTool.exe to NATIVEDSD, there is a more recent firmware. CPLD_1082 series and 2006be15 series are firmware that can be flashed in...

Sorry, the MD2 is not my model and I haven't tested it.

WARNING: If you can't tolerate damage to your device while performing this mod, please don't try, I just posted how to do the mod. We would like to give you a brief introduction on how to replace the firmware of Zishan U1. First, disassemble U1, carefully remove the battery part attached to...

Nice to meet you, I'm an earfi user living in Korea and I'm enjoying the software modification of the Zishan U1. Earphones were using DROP's Planamic, but they broke down within two days of purchase, so you need to find a replacement.