0 Alternative to A.R.I.S.E. Sound System Mod for Android 9+

For better Android sound system, you can follow the steps below :

Alternative 1 (Treble ROM and non-Treble ROM supported) - Ainur Narsil + Dolby Digital Plus + ViPER4Android FX + v4arise preset :

1. Download this source.
2. Flash Ainur Narsil with Magisk.
3. Install ViPER4Android FX 2.7.apk then open it's app and install driver. Next, extract ViPER4Android-2.7-presets-v2.0.zip to /sdcard/Android/data/com.pittvandewitt.viperfx/files.
4. Flash Audio Modification Library (AML) with Magisk then restart your phone.
5. Flash Dolby Digital Plus with Magisk (do not open it).
6. Flash Audio Compatibility Patch with Magisk then restart your phone.
7. Treble ROM jump to step 8; for non-Treble ROM, boot to recovery then flash vendor_patch_non-treble_v4a_ddp_ainur-narsil.zip
8. You can open Dolby or DDPlus and ViPER4Android FX now. 
9. I suggest you to use v4arise preset on ViPER4Android FX 2.7 and use original Movie preset on Dolby or DDPlus.

Alternative 2 (Treble ROM only) - Ainur Narsil + Dolby Atmos + ViPER4Android FX + V4ARISE preset :

1. Download this source.
2. Flash ACDB with Magisk.
3. Flash ViperFX-0.95-ACDB with Magisk then extract ViPER4Android.zip to /sdcard.
4. Flash Dolby Atmos Blend or RC4 with Magisk.
5. Flash Ainur Narsil from Magisk.
6. I suggest you to use V4ARISE preset on ViPER4Android FX 2.7 and do not change any settings on Dolby Atmos.

Credits :
Ainur Radio, ViPER520, Dolby Audio™, Zackptg5, ACDB, A.R.I.S.E Sound Systems™, XDA, and many people that contributing to this.