Credit goes to developer
6.1.22 Update log:
PASSWORD: 2b65
1: Synchronous update to MIUI Developer Edition 272 weeks, the specific reference MIUI official update.
2: removal meters depth sound effects (the removal of switches and effects), solve MAXX Audio and rice tone conflict, MAXX sound implantation.
Install instructions
1. Install Latest custom recovery (TWRP recommended).
2. Copy custom ROM zip file to sd-card (external).
3. Boot into recovery mode.
4. Now select wipe.
5. Advance wipe & select system, data, dalvik cache, cache.
6. Select install & select downloaded zip file.
7. Install success.
If rooted no problem, if not rooted then please flash superuser zip using recovery to get your device rooted.