Hi-Res Audio™

Enable High-resolution audio for MediaTek devices up to 32-bit/192kHz (if device supports).

Important

this module only changes the configuration on audio_policy because most Android devices limit their capabilities to 16-bit/48kHz only, the rest depends on whether the device used supports Hi-Res Audio™ or not.

Caution

for Snapdragon user, u can use this from reiryuki.

*applies to internal Speakers & Wired (not for Bluetooth/USB devices).

Take note

before install this module, try to get about what sampling rate is used on ur device, open terminal (adb, Termux, etc) with superuser su access, then enter the command:

  dumpsys media.audio_flinger

look at the very top of the "Output thread" (MIXER) u will get information about:

• Sample rate: 48000Hz or 192000Hz
• Flags (AudioStreamOut): AUDIO_OUTPUT_FLAG_PRIMARY or AUDIO_OUTPUT_FLAG_DEEP_BUFFER
• Format: AUDIO_FORMAT_PCM_16_BIT or AUDIO_FORMAT_PCM_32_BIT

or u can use "Sample Rate Checker" app:

for testing the Hi-Res Audio using song with 24-bit/192kHz & using USB Audio Player Pro (UAPP) app:

UAPP using Variable rate in Settings > Android audio > Android sample rate : Variable Rate (default is Fixed 44100 Hz)

The Result for v2.0 with AAudio & MMAP (using Device HW Info):

grant root access, then enter audio option

Configurations

Note

This configuration is what can be implemented on audio_policy which of course must be in accordance with the API version. i don't provide information for Android 11 and below, because this module is specifically for Android 12 and higher. if you are not satisfied with my module, you can modify it according to what i explained.

Read more for Configuration?

Sampling Rate : 44100, 48000, 88200, 96000, 192000, 256000, 384000
Format & Bit Depth :

• AUDIO_FORMAT_PCM_8_BIT
• AUDIO_FORMAT_PCM_16_BIT
• AUDIO_FORMAT_PCM_8_24_BIT
• AUDIO_FORMAT_PCM_24_BIT_PACKED
• AUDIO_FORMAT_PCM_32_BIT
• AUDIO_FORMAT_PCM_FLOAT

PCM is the standard output format, as it is a raw format and more flexible, rather than including formats that are specific to one particular format. for example, for MP3 we need to include AUDIO_FORMAT_MP3, likewise for other formats. this is not flexible therefore PCM is used as a universal output format.

Flags :

• AUDIO_OUTPUT_FLAG_NONE
• AUDIO_OUTPUT_FLAG_DIRECT
• AUDIO_OUTPUT_FLAG_PRIMARY
• AUDIO_OUTPUT_FLAG_FAST
• AUDIO_OUTPUT_FLAG_DEEP_BUFFER
• AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD
• AUDIO_OUTPUT_FLAG_NON_BLOCKING
• AUDIO_OUTPUT_FLAG_HW_AV_SYNC
• AUDIO_OUTPUT_FLAG_TTS
• AUDIO_OUTPUT_FLAG_RAW
• AUDIO_OUTPUT_FLAG_SYNC
• AUDIO_OUTPUT_FLAG_IEC958_NONAUDIO
• AUDIO_OUTPUT_FLAG_DIRECT_PCM
• AUDIO_OUTPUT_FLAG_MMAP_NOIRQ
• AUDIO_OUTPUT_FLAG_VOIP_RX
• AUDIO_OUTPUT_FLAG_INCALL_MUSIC
• AUDIO_OUTPUT_FLAG_GAPLESS_OFFLOAD (Android 12)
• AUDIO_OUTPUT_FLAG_SPATIALIZER (Android 13)
• AUDIO_OUTPUT_FLAG_ULTRASOUND (Android 14)
• AUDIO_OUTPUT_FLAG_BIT_PERFECT (Android 15)

Some Flags are only available on Android with the new API version.

Channels :

• AUDIO_CHANNEL_OUT_MONO (front-left)
• AUDIO_CHANNEL_OUT_STEREO (front-left, front-right)
• AUDIO_CHANNEL_OUT_2POINT1 (front-left, front-right, low-frequency)
• AUDIO_CHANNEL_OUT_TRI (front-left, front-right, front-center)
• AUDIO_CHANNEL_OUT_TRI_BACK (front-left, front-right, back-center)
• AUDIO_CHANNEL_OUT_3POINT1 (front-left, front-right, front-center, low-frequency)
• AUDIO_CHANNEL_OUT_2POINT0POINT2 (front-left, front-right, top-side-left, top-side-right)
• AUDIO_CHANNEL_OUT_2POINT1POINT2 (front-left, front-right, top-side-left, top-side-right, low-frequency)
• AUDIO_CHANNEL_OUT_3POINT0POINT2 (front-left, front-right, front-center, top-side-left, top-side-right)
• AUDIO_CHANNEL_OUT_3POINT1POINT2 (front-left, front-right, front-center, top-side-left, top-side-right, low-frequency)
• AUDIO_CHANNEL_OUT_QUAD (front-left, front-right, back-left, back-right)
• AUDIO_CHANNEL_OUT_QUAD_SIDE (front-left, front-right, side-left, side-right)
• AUDIO_CHANNEL_OUT_SURROUND (front-left, front-right, front-center, back-center)
• AUDIO_CHANNEL_OUT_PENTA (quad, front-center)
• AUDIO_CHANNEL_OUT_5POINT1 (front-left, front-right, front-center, low-frequency, back-left, back-right)
• AUDIO_CHANNEL_OUT_5POINT1_SIDE (front-left, front-right, low-frequency, side-left, side-right)
• AUDIO_CHANNEL_OUT_5POINT1POINT2 (5.1, side-left, side-right)
• AUDIO_CHANNEL_OUT_5POINT1POINT4 (5.1, top-front-left, top-front-right, top-back-left, top-back-right)
• AUDIO_CHANNEL_OUT_6POINT1 (front-left, front-right, front-center, low-frequency, back-left, back-right, back-center)
• AUDIO_CHANNEL_OUT_7POINT1 (front-left, front-right, front-center, low-frequency, back-left, back-right, side-left, side-right)
• AUDIO_CHANNEL_OUT_7POINT1POINT2 (7.1, top-side-left, top-side-right)
• AUDIO_CHANNEL_OUT_7POINT1POINT4 (7.1, top-front-left, top-front-right, top-back-left, top-back-right)
• AUDIO_CHANNEL_OUT_9POINT1POINT4 (7.1.4, front-wide-left, front-wide-right)
• AUDIO_CHANNEL_OUT_9POINT1POINT6 (9.1.4, top-side-left, top-side-right)
• AUDIO_CHANNEL_OUT_13POINT_360RA (front-left, front-right, front-center, side-left, side-right, top-front-left, top-front-right, top-front-center, top-back-left, top-back-right, bottom-front-left, bottom-front-right, bottom-front-center)
• AUDIO_CHANNEL_OUT_22POINT2 (7.1.4, front-left-of-center, front-right-of-center, back-center, top-center, top-front-center, top-back-center, top-side-left, top-side-right, bottom-front-left, bottom-front-right, bottom-front-center, low-frequency-2)
• AUDIO_CHANNEL_OUT_MONO_HAPTIC_A (mono, haptic-a)
• AUDIO_CHANNEL_OUT_STEREO_HAPTIC_A (stereo, haptic-a)
• AUDIO_CHANNEL_OUT_HAPTIC_AB (haptic-a, haptic-b)
• AUDIO_CHANNEL_OUT_MONO_HAPTIC_AB (mono, haptic-ab)
• AUDIO_CHANNEL_OUT_STEREO_HAPTIC_AB (stereo, haptoc-ab)

this will not give a change in AudioFlinger level, only the audio_policy but still give an effect.

Boost Gain/Volume

Tip

Boost Gain/Volume (without distortion)
Follow my gist instructions: Here (non-root)

Requirement

this is module so install using Magisk/KSU/APatch app: Download from Release page

Important

• Android 12 (SDK 31)
• MTK devices
  

doesn't cause softbrick or bootloop.

Apps & Song

• Device HW Info: Here
• Sample Rate Checker: Here
• FLAC (24-bit/192kHz): Download Song
• USB Audio Player Pro (UAPP): Here

Tested on (Stock ROM)

• Android 12 - MIUI 13
• Android 13 - MIUI 14
• Android 14 - HyperOS 1.0

etc.

References:
• Audio Policy configuration
• AAudio & MMAP
• Deep Buffer

Sources:
• audio_policy.conf
• audio_policy_configuration.xml
• Playback_ParamTreeView.xml
• Flags, Channels output & Format