For new users, please read about PerfectDynamics 2.0 Sound Optimizations first for new improvements with Fidelizer ROMs.
After successful ports of iBasso DX220 ROM to DX150 and DX200 devices, it’s finally time to add Purist ROM optimizations to actual DX220 now. I tested with real iBasso DX220 DAP before applying Fidelizer Mod optimizations to confirm that it worked fine.
-Based on iBasso DX220 firmware version Oreo 8.1 V1.09.092
–Yalp Store is added as Play Store’s alternative (I still keep Google services for those who want to install Play Store through other means)
-Apollo – Fidelity Edition from https://forum.xda-developers.com/android/apps-games/apollo-music-player-fidelity-edition-t3038629 included
-MangoPlayer app has optimizations applied
-build.prop tweaks for better video and storage performance and improve battery life
-Audio engine optimized for only audio playback (EQ/Gaplass features work)
Download: iBasso DX220 Purist ROM
Installation Guide
1. Turn off DX220
2. Connect DX220 with USB connection to computer while holding play button switch
3. Install Rockchip USB driver included in AndroidTool
4. Flash Official Oreo ROM firmware from iBasso with instructions provided
5. After successfully flashing official ROM, go to Settings > System > About tablet and tap “Build number” for 7 times to enable “Developer options”
6. Tap back arrow to enter “Developer options”, enable “USB debugging”, and press OK
7. Connect DX220 to computer with USB connection in Android mode again and press OK to allow USB debugging
8. Download Disable Verity package and run disable_verity.bat file
9. After DX220 boots up properly with Verity disabled, turn off device and connect with USB connection to computer while holding play button
10. Open AndroidTool, click on “Upgrade Firmware” tab, click on Firmware button and select update.img extracted from Purist ROM then click Upgrade button
If you like improvements in Purist ROM, you may upgrade to Enhanced / Advanced ROM for even better sound. Please read Portable Products for more details including iBasso DX220 Fidelizer Mod project with 3 modification levels and happy listening. 🙂