View Issue Details
|Category||Date Submitted||Last Update|
|[All Projects] Revolution OS - MIUI||2019-01-18 16:52||2019-02-04 02:19|
|Fixed in Version|
|Summary||0000164: Redmi Note 4 snapdragon (mido): horrible sound quality in phone calls via external loudspeaker|
|Description||Since the new update 9.1.15 (first one switching from China base to global base), the sound of the external speaker during phone calls has become very bad, much too loud (not really possible to reduce the volume) and very distorted!|
This phenomenon is exactly the same as it occurs in all the xiaomi.eu roms I tested during the past few months! I think, Revolution OS took the sound code/sound manipulations directly from xiaomi.eu.
This bad sound quality does NOT occur in the most recent China developer rom (9.1.17) and it did not occur in the developer roms of the past few months I tested!
The bad sound quality is not present in the Global developer roms either!
It is specific to xiaomi.eu roms and now to Revolution OS, too.
According to some searching I did it may be specific to mido - because the few people that talk about this issue all use mido!
|Steps To Reproduce||- use a redmi note 4 snapdragon device|
- use Revolution OS 9.1.15 (or just for the record: xiaomi.eu roms)
- make phone calls
- use the external loudspeaker (you get really loud sound that is distorted, the sound volume can hardly be diminished)
|Additional Information||- no such problems in the former 8.12.6 Revolution OS|
- no such problems in current and earlier China roms
- no such problems in current and earlier Global roms
|Device||Xiaomi Redmi Note 4 (snapdragon version)|
This problem is solved!
I found the source of the issue, it is these two (or, perhaps, only one of them) entries in build.prop that obviously stem from xiaomi.eu:
If I modify these entries and substitute them by the corresponding lines in the china roms (and also the 8.12.6 revolution os), in-call sound via the external loudspeaker is good again! No more extreme volume (much too loud), no more distortion.
The good entries should be:
This is valid for "mido" - I do not know if other devices suffer from the same issue...
||I forgot to add that the previous comment also came from me, Fred. :-)|
You announced that the sound issue will be dealt with in the next version of Revolution OS in February 2019.
But please be aware, like I said before, that this issue may be "mido specific". Many Xiaomi users complain about sound issues like low volume and such - but these users have different devices and perhaps, the build.prop changes in your current version benefit them, whilst they are harmful for mido users.
I only write this expecting users complaining after the reversal of the build.prop changes. I suggest, you better test the changes with mido and with other devices. Thanks.