[Android Q&A, Help & Troubleshooting] hireshnaik:
This is the audiopolicy of my phone

What do I need to edit ?

# Global configuration section: lists input and output devices always present on the device

# as well as the output device selected by default.

# Devices are designated by a string that corresponds to the enum in audio.h

global_configuration {

attached_output_devices AUDIO_DEVICE_OUT_EARPIECE|AUDIO_DEVICE_OUT_SPEAKER

default_output_device AUDIO_DEVICE_OUT_SPEAKER

attached_input_devices AUDIO_DEVICE_IN_BUILTIN_MIC|AUDIO_DEVICE_IN_BACK_MIC|AUDIO_DEVICE_IN_VOICE_CALL|AUDIO_DEVICE_IN_REMOTE_SUBMIX

}

# audio hardware module section: contains descriptors for all audio hw modules present on the

# device. Each hw module node is named after the corresponding hw module library base name.

# For instance, "primary" corresponds to audio.primary.<device>.so.

# The "primary" module is mandatory and must include at least one output with

# AUDIO_OUTPUT_FLAG_PRIMARY flag.

# Each module descriptor contains one or more output profile descriptors and zero or more

# input profile descriptors. Each profile lists all the parameters supported by a given output

# or input stream category.

# The "channel_masks", "formats", "devices" and "flags" are specified using strings corresponding

# to enums in audio.h and audio_policy.h. They are concatenated by use of "|" without space or "\n".

audio_hw_modules {

primary {

outputs {

primary {

sampling_rates 48000

channel_masks AUDIO_CHANNEL_OUT_STEREO

formats AUDIO_FORMAT_PCM_16_BIT

devices AUDIO_DEVICE_OUT_EARPIECE|AUDIO_DEVICE_OUT_SPEAKER|AUDIO_DEVICE_OUT_WIRED_HEADSET|AUDIO_DEVICE_OUT_WIRED_HEADPHONE|AUDIO_DEVICE_OUT_ALL_SCO|AUDIO_DEVICE_OUT_AUX_DIGITAL|AUDIO_DEVICE_OUT_DGTL_DOCK_HEADSET

flags AUDIO_OUTPUT_FLAG_PRIMARY

}

# deep_buffer {

# sampling_rates 44100

# channel_masks AUDIO_CHANNEL_OUT_STEREO

# formats AUDIO_FORMAT_PCM_16_BIT

# devices AUDIO_DEVICE_OUT_SPEAKER|AUDIO_DEVICE_OUT_WIRED_HEADSET|AUDIO_DEVICE_OUT_WIRED_HEADPHONE

# flags AUDIO_OUTPUT_FLAG_DEEP_BUFFER

# }

hdmi {

sampling_rates 44100|48000|32000

channel_masks AUDIO_CHANNEL_OUT_MONO

formats AUDIO_FORMAT_AC3|AUDIO_FORMAT_EAC3

devices AUDIO_DEVICE_OUT_AUX_DIGITAL

flags AUDIO_OUTPUT_FLAG_DIRECT

}

}

inputs {

primary {

sampling_rates 8000|11025|16000|22050|24000|32000|44100|48000

channel_masks AUDIO_CHANNEL_IN_MONO|AUDIO_CHANNEL_IN_STEREO|AUDIO_CHANNEL_IN_VOICE_CALL

formats AUDIO_FORMAT_PCM_16_BIT

devices AUDIO_DEVICE_IN_BUILTIN_MIC|AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET|AUDIO_DEVICE_IN_WIRED_HEADSET|AUDIO_DEVICE_IN_BACK_MIC|AUDIO_DEVICE_IN_VOICE_CALL|AUDIO_DEVICE_IN_FM_RADIO|AUDIO_DEVICE_OUT_REMOTE_SUBMIX

}

}

}

a2dp {

outputs {

a2dp {

sampling_rates 44100

channel_masks AUDIO_CHANNEL_OUT_STEREO

formats AUDIO_FORMAT_PCM_16_BIT

devices AUDIO_DEVICE_OUT_ALL_A2DP

}

}

}

r_submix {

outputs {

submix {

sampling_rates 48000

channel_masks AUDIO_CHANNEL_OUT_STEREO

formats AUDIO_FORMAT_PCM_16_BIT

devices AUDIO_DEVICE_OUT_REMOTE_SUBMIX

}

}

inputs {

submix {

sampling_rates 48000

channel_masks AUDIO_CHANNEL_IN_STEREO

formats AUDIO_FORMAT_PCM_16_BIT

devices AUDIO_DEVICE_IN_REMOTE_SUBMIX

}

}

}

usb {

outputs {

usb_accessory {

sampling_rates 44100

channel_masks AUDIO_CHANNEL_OUT_STEREO

formats AUDIO_FORMAT_PCM_16_BIT

devices AUDIO_DEVICE_OUT_USB_ACCESSORY

}

usb_device {

sampling_rates 44100

channel_masks AUDIO_CHANNEL_OUT_STEREO

formats AUDIO_FORMAT_PCM_16_BIT

devices AUDIO_DEVICE_OUT_USB_DEVICE

}

}

}

}