[BUG][IN-CALL MIC VOLUME LOW][Redmi Note 4 SD] - Xiaomi Redmi Note 4 Questions & Answers

Device:
Redmi Note 4 SD
OS:
MIUI 8 up to 8.5.4.0 all official and xiaomi.eu versions flashable zips,
MIUI 9 official stable release and xiaomi.eu versions flashable zips and MIUI Pro as well,
Fastboot flash Global ROM MIUI 8.5.4.0,
Fastboot flash developer ROM MIUI 9 7.8.24,
RR, AEX, LOS up to 7.1.2
Android Oreo 8.1.0; Cardinal AOSP 5.3.1, OmniROM Oreo
Problem:
In-call mic volume is too low / distorted unless you speak very close to the phone. If phone is tilted, other person can hear only a robotic sound coming from space (most probably aggressive noise cancellation). However, internet calling apps (WhatsApp, FB Messenger, IMO etc.) work quite normal. Voice Recorder and Camera recordings are also quite acceptable. Though video recording from some distance has bad audio. Not tested for audio recording.
Failed Solutions:
Tried by disabling Google Voice / "OK Google" and denying Mic permission for Google app. Also tried SoundAbout app. Nothing helps.
Editing these files (as guided in 4pda post) improves the quality a little bit:
/system/etc/audio_platform_info.xml,
/system/etc/media_profiles.xml,
/system/etc/mixer_paths_mtp.xml,
system/build.prop
WORKING SOLUTION:
Changing "ro.qc.sdk.audio.fluencetype" value to "none" improves the low volume issue but with low quality voice (in-call noise) and disturbed speakerphone (low) and earphone (high) volumes. Speakerphone volume is fixed by editing "audio_platform_info.xml".
1. Unlock bootloader
2. Install custom recovery
3. Use my flashable zip if you don't wanna go through this hassle of step 4 & 5 manually. V-2 fixes both of these issues i.e. in-call mic volume (4) and speakerphone volume (5).
or
To fix in-call mic volume:
4 (i). Root your device.
(ii). Edit build.prop in /system with any text editor.
(iii). Find this line:
Code:
ro.qc.sdk.audio.fluencetype=[COLOR="red"]fluence[/COLOR]
On Oreo, it's
Code:
ro.vendor.audio.sdk.fluencetype=[COLOR="red"]fluence[/COLOR]
(iv). Replace "fluence" with "none".
(v). Reboot or proceed to next step.
To fix low speakerphone volume after disabling noise cancellation:
5 (i). Edit audio_platform_info.xml in /system/etc with any text editor.
On Oreo, it's /system/vendor/etc/audio_platform_info.xml​(ii). Find this line:
Code:
<device name="SND_DEVICE_OUT_VOICE_SPEAKER" acdb_id="[COLOR="red"]50[/COLOR]"/>
(iii). Change value to 50 or if not found, add complete line at end before:
Code:
</acdb_ids>
</audio_platform_info>
(iv). Reboot.
CHANGELOG:
v-4
Support for Android Oreo added
v-5
Set SELinux Context on modified files.
v-7
Works with Android 10
v-8
Minor fixes
Edit 1:
Setting "ro.qc.sdk.audio.fluencetype" value in build.prop to "fluencepro" instead of "fluence" makes no difference.
Edit 2:
Changing "ro.qc.sdk.audio.fluencetype" value to "none" or "persist.audio.fluence.voicecall" value to "false" improves the mic volume (no other changes required) but with low quality voice, even distorted. Earphone volume and speakerphone volumes are disturbed. Respectively one is too louder, second is hard to listen.
Edit 3:
Magisk module "Android Mic Fix" claim to modify these values in build.prop but it doesn't work on RN4.
Code:
ro.qc.sdk.audio.fluencetype=none
persist.audio.fluence.voicerec=true
persist.audio.fluence.speaker=false
use.voice.path.for.pcm.voip=true
Edit 4:
Editing these lines in /system/etc/mixer_path_mtp.xml doesn't fix speakerphone volume after fluence disabled:
Code:
<ctl name="RX3 Digital Volume" value="89" />
Origianl value is "78".
Code:
<ctl name="Speaker Boost" value="ENABLE" />
Original value is "DISABLE".
Suggestion:
There are also a few further lines mentioned in different forums which can be added to build.prop but these aren't found by default in Redmi Note 4. Anyone tried these?
persist.audio.fluence.mode = endfire or false
persist.audio.handset.mic = digital or analog
persist.audio.voice.clarity = ON or none
persist.audio.voicecall.mic = 0
persist.audio.aanc.enable = false
persist.audio.handset_rx_type = DEFAULT
persist.audio.nsenabled = ON
persist.audio.fluence.audiorec = false
persist.audio.fluence.spk.mono = true or false
persist.audio.spkcall_2mic = OFF

---

If you have magisk, maybe you can try android mic fix module, just maybe,.and plz tell if it works...
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Sent from my Xiaomi RN4x

---

spaxon said:
If you have magisk, maybe you can try android mic fix module, just maybe,.and plz tell if it works...
Click to expand...
Click to collapse
Don't have magisk right now, but I'll definitely try and update.

---

I applied this, rebooted, will monitor it in the next few days.

---

spaxon said:
If you have magisk, maybe you can try android mic fix module, just maybe,.and plz tell if it works...
Click to expand...
Click to collapse
Magisk module claim to modify these values in build.prop but it doesn't work on RN4.
Code:
ro.qc.sdk.audio.fluencetype=none persist.audio.fluence.voicerec=true persist.audio.fluence.speaker=false use.voice.path.for.pcm.voip=true

---

jazzh said:
I applied this, rebooted, will monitor it in the next few days.
Click to expand...
Click to collapse
I'm disappointed. It's even worse now than before, speaker incall output is too low, while music is ok. I disabled and uninstalled this magisk module, rebooted, but still low. Any suggestions?

---

I remeber that i fixd this problem on mi4c with changing numbers in this file: system/etc/mixer_paths.xml
Now im trying to fix this on redmi note 4 with ResurrectionRemix, i will test few things.
I used this examples: https://github.com/morphicts/android_device_xiaomi_libra/pull/2/files#r70112222

---

CiupaSs said:
I remeber that i fixd this problem on mi4c with changing numbers in this file: system/etc/mixer_paths.xml
Now im trying to fix this on redmi note 4 with ResurrectionRemix, i will test few things.
I used this examples: https://github.com/morphicts/android_device_xiaomi_libra/pull/2/files#r70112222
Click to expand...
Click to collapse
I tried my best. Nothing works. Do tell if it improves the situation

---

jazzh said:
I'm disappointed. It's even worse now than before, speaker incall output is too low, while music is ok. I disabled and uninstalled this magisk module, rebooted, but still low. Any suggestions?
Click to expand...
Click to collapse
Manually modify these values in /system/build.prop:
Code:
ro.qc.sdk.audio.fluencetype=none
persist.audio.fluence.speaker=false
to
Code:
ro.qc.sdk.audio.fluencetype=fluence
persist.audio.fluence.speaker=true
Backup before any modifications in case if something goes wrong accidentally

---

mirfatif said:
Manually modify these values in /system/build.prop:
Code:
ro.qc.sdk.audio.fluencetype=none
persist.audio.fluence.speaker=false
to
Code:
ro.qc.sdk.audio.fluencetype=fluence
persist.audio.fluence.speaker=true
Backup before any modifications in case if something goes wrong accidentally
Click to expand...
Click to collapse
No, nothing helps. I applied this build.prop lines, as well as xml lines as per video, but still low spkphone call volume... Everything else OK.

---

jazzh said:
No, nothing helps. I applied this build.prop lines, as well as xml lines as per video, but still low spkphone call volume... Everything else OK.
Click to expand...
Click to collapse
If you fix mic volume by editing build.prop, speakerphone volume will be low (hardly audible) and earphone volume will be high (distorted). If you compromise on mic volume, both others will be good. So it's a choice. I prefer mic volume to be fixed because I rarely use speakerphone or earphone for calls.
Editing other files in /system/etc/ doesn't fix mic volume. I think they fix audio / video recording volume which isn't my problem.

---

I'm still having that problem...

---

jazzh said:
I'm still having that problem...
Click to expand...
Click to collapse
What problem? Low mic volume or low speakerphone volume?

---

mirfatif said:
What problem? Low mic volume or low speakerphone volume?
Click to expand...
Click to collapse
speakerphone. when I'm talking to someone on the speakerphone I can barely hear him.

---

jazzh said:
speakerphone. when I'm talking to someone on the speakerphone I can barely hear him.
Click to expand...
Click to collapse
I already stated if you fix mic volume by changing "ro.qc.sdk.audio.fluencetype" value to "none" or "persist.audio.fluence.voicecall" value to "false" in build.prop, speakerphone volume is automatically disturbed (hardly audible). No fix found for this so far

---

mirfatif said:
I already stated if you fix mic volume by changing "ro.qc.sdk.audio.fluencetype" value to "none" or "persist.audio.fluence.voicecall" value to "false" in build.prop, speakerphone volume is automatically disturbed (hardly audible). No fix found for this so far
Click to expand...
Click to collapse
I reverted these changes back, but no improvement. Will it help if I flash miui global stable 8.2.10.0 again?

---

jazzh said:
I reverted these changes back, but no improvement. Will it help if I flash miui global stable 8.2.10.0 again?
Click to expand...
Click to collapse
There must be some changes which aren't reverted. Replace build.prop with original file if you have backup. Otherwise flashing rom will definitely resolve the problem. Prefer fastboot flashing

---

mirfatif said:
I tried my best. Nothing works. Do tell if it improves the situation
Click to expand...
Click to collapse
It was good solution, i changed everything over 90 and now i can hear everything, im using RR rom.
I dont know which lane is for earspeaker cause now everything is on rly high volume ;d

---

CiupaSs said:
It was good solution, i changed everything over 90 and now i can hear everything, im using RR rom.
I dont know which lane is for soundspeaker cause now everything is on rly high volume ;d
Click to expand...
Click to collapse
In what file mate?

---

CiupaSs said:
It was good solution, i changed everything over 90 and now i can hear everything, im using RR rom.
I dont know which lane is for earspeaker cause now everything is on rly high volume ;d
Click to expand...
Click to collapse
And speakerphone volume? It must be down. Right?