Moondrop River 2 noise floor

[magisk-modules-alt-repo]

Moondrop River 2 noise floor

[Hill-98]

I tested Moondrop River 2 on 4 phones respectively, namely OPPO Reno 5 Pro+ (my main phone), Nokia 7, Meizu Pro6s and Realme X7 Pro, there is no noise floor on Meizu Pro6s and Realme X7 Pro, One thing these two phones have in common is that they both use MediaTek chipsets, while OPPO and Nokia use Qualcomm chipsets. Will it be related to chipsets?

[yzyhk904]

There are two differences between MediaTek (as well as Google Tensor) and Qualcomm SoC devices. The former use the USB HAL audio driver and no DRC (Dynamic Range Control), and the latter use the hardware offload (USB tunneling) audio driver and DRC.

I think you could hear DRC distortion if your Qualcomm phones use low quality DRC. Unless so, perhaps you hear jitter distortion because my module reduces jitter effectively on the USB HAL audio driver (its USB transfer period is optimized).

You can check them if you use my another tool USB_SampleRate_Changer. See its README.md.

[Hill-98]

Are DRC and SOC models related? I only tested this mod on Nokia 7 because other phones don't have Magisk and root.

I will try USB_SampleRate_Changer on Nokia 7 later

By the way, the SOC models used by these phones:

• OPPO Reno5 Pro+: Qualcomm Snapdragon 865
• Nokia 7: Qualcomm Snapdragon 630
• Meizu Pro6s: MediaTek Helio X25
• Realme X7 Pro: MediaTek Dimensity 1000+

[Hill-98]

I tried USB_SampleRate_Changer and allowed it with the --bypass-offload parameter. Then I also installed audio-misc-setting, but it didn't feel any obvious improvement.

[yzyhk904]

Are DRC and SOC models related? I only tested this mod on Nokia 7 because other phones don't have Magisk and root.

All Qcomm 8 core SoC devices have been shipped with DRC on all audio outputs, but you can disable it with root.

I tried USB_SampleRate_Changer and allowed it with the --bypass-offload parameter. Then I also installed audio-misc-setting, but it didn't feel any obvious improvement.

Um, I have no idea now.

[Hill-98]

Well, I guess changing my phone is the best solution for me. Thank you for your answer!