Accessories How-To

[Solved] Headphone Audio Channel Swap issue on OnePlus Phones

Many smartphone manufacturers abandoned beloved 3.5mm headphone jack in favor of technologies & design. Since most people were changing to wireless technologies, it was not big a deal. But, still many users who prefer their wired headphones use an adapter for USB-C to 3.5mm. But most OnePlus users are reporting headphone audio channel swap issue in audio playback that the audio channels are reversed. To be clear, the audio that should come out of the Right earpiece is coming out of the Left earpiece and vice versa.

Although there is no perfect reason or solution for this OnePlus headphone audio swap channel issue from the OnePlus team, but the users are reporting that there is no issue with Bluetooth playback. This audio swap issue can also be dated back to times of OnePlus 5T when they had a headphone jack on them.

OnePlus headphone audio channel swap issue

How to fix OnePlus headphone audio channel swap issue

If you have normal in-ear headphones, you can simply replace the right earpiece with the left while inserting it into your ear. But, if you have a half in-ear or similar ones with ear-specific insertion, it is impossible to swap them.

Although media playback such as music or video will not be an issue, but it can be difficult to use it for playing games such as PUBG Mobile or Call of Duty Mobile since they use spatial audio for hearing enemy directions. So, until we get official fixes from OnePlus, here are a few things that you can do to solve this problem:

Channel Swap in Media Apps

You can use some third party media playing apps like VLC or MX player and swap the audio channels while playing audio or video files. This effect works within that app itself.

Also read: 12 Best USB-C Headphones

Install MX player, open your media file, select HW+ or SW decoder for audio and go to Option by tapping on three dots, Audio > Stereo mode > Reverse stereo. This will reverse the audio channel for your video playback.

Changing Audio Output to Mono

If you are just annoyed by the reversed output and don’t want any stereo effect while playback, then you can simply turn on mono audio output on your phone.

Resolved OnePlus earphone audio channel swap issue

Go to Settings > Accessibility and enable Mono Audio. This merges both rights and left output int a single channel.

Change Mixer Path in Rooted Device

If you have a rooted device, then you are in a bit of great luck. You have access to system files and folders, so you can configure and reverse the output.

Warning: This is not recommended as modifying system files may result in an unusable phone. So proceed only if you know what you are doing.

Open any root file explorer app and navigate to the following folder: /system/vendor/etc/ and look for the file named mixer_paths.xml.

Note: Create a backup of the file to use later if something goes wrong.

Open the file in a text editor, and find these lines under

<path name="headphones">
<ctl name="RX1 MIX1 INP1" value="RX1" />
<ctl name="RX2 MIX1 INP1" value="RX2" />

and change it with:

<ctl name="RX1 MIX1 INP1" value="RX2" />
<ctl name="RX2 MIX1 INP1" value="RX1" />

This swaps channels 1 to 2 and vice versa. Here channels 1, 2 means left and right channels of audio. Save it and reboot. Check if it works.


Although these methods could work, they are temporary. Better write to customer care and wait for an official solution on the issue. People spend a huge amount of money on flagship-level phones. Hence consumers can not tolerate such issues, considering the price point.

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How to Fix OnePlus Microphone/Headphone is Not Working

Fix OnePlus Microphone/Headphone is not working: OnePlus is a flagship killer smartphone arrived in the portable device market several years ago. The manufacturer left an appreciative scar in the hearts of millennial and it doesn’t seem to disappear anytime soon. Rival manufacturers are seeking for an opportunity to dethrone the flagship killer by utilizing a petty mistake.

Folks have reported that OnePlus latest models are failing to produce Audio output and Microphone input via headphone. There are numerous reports emerged stating that the Microphone and Speaker not working in OnePlus 6T, 7, 7 Pro and 7T in-game while playing multi-player games like PUBG-M.

One tiny mistake can turn the tables against the OnePlus manufacturer, but we have a few solutions that you might give a shot to stabilize the situation.

oneplus microphone issue

How to Fix OnePlus Microphone/Headphone is Not Working

1. Microphone, Earpiece and Headphone Jack Not Working

We have to address the elephant in the room and take on the major issue first hand. No one can communicate with the loved ones and business people if the entire audio chipset is not functioning. Recent software updates from the manufacturer messed up the entire build and the software failing to take hardware to full extent.

Android smartphones gifted with safe mode function, which load Android OS drivers only. The Safe Mode leaves other apps in the bunker, and the counter interruption application does not affect the performance whatsoever. You can use the opportunity to identify the culprit or the end zone of the root cause.


  • Get into OnePlus Android safe mode and test the functions for software failure.
  • Reach out the nearest OnePlus service centre to get it a quick checkup.

The audio chipset failure is occurring in latest 5.0.7 update + 5.0.6 update.

Related: How to Fix OnePlus Bluetooth Problems

2. Turn Off Voice Apps

The 2019 year has witnessed innovation in voice commands applications and services. Android smartphone directly equipped with voice services such as “OK Google” and OnePlus-own voice service. These audio services run in the background listening to the conversation quietly like a night wolf. The microphone in the Headphones and Dual internal microphones are at work constantly.

Most demanding games such as PUBG-M have an algorithm to suppress noise gate, which requires maximum utilization of the Main microphone and Secondary microphone. The Google voice app running in the background cannot give away the main source of the function to another demanding app. Thus, we have a counter-fight between voice command apps and multiplayer games.

Solution: Turn off voice searches and actions.

Also Read: How to Fix OnePlus WiFi Problems

3. Bluetooth Headset Microphone Not Working

Bluetooth headsets manufacturers are bundling the modern generation wireless headphones with an advanced microphone. Interestingly, folks have reported that callers are unable to pick up voice waves from the wireless headphones. No one has come across the solution on the issue yet, and Bluetooth 4.0+ does not have such drawbacks either.


  1. Launch an inbuilt audio recorder to test microphone functionalities quickly.
  2. You can determine the quality based on the audio delay and shutters. Assuming the delay occurred then the wireless headphone microphone is not good enough to send & receive audio wave’s real-time.
  3. The recording comes out sharp & crystal clear, and then you may have discovered an internal bug.

Report the bug to the OnePlus community so that the official developers can investigate the matter further.

Recommended: What is OnePlus Pocket Mode

4. Echo & Unclear Voice

The millennial consume considerable period to understand the hardware industry as none of the devices are 100% dust-proof in reality. There is always a probability of dust damages regardless of 100% protection against dust. The small dust particles are capable enough to enter into the vents to block the audio including microphone wavelengths as well.

The tiny particles do not seem to harm the device at the beginning, but they can gain mass over time by combining with other relevant dust particles. Cleaning the vents once in a while is a good habit, and it keeps the device from harvesting “inorganic” or “organic” dust.

Solution: Take a cotton bud and start cleaning the audio input and audio output vents.

5. Reset your OnePlus phone

OnePlus eliminated stock Android interface from the entire root system to apply Oxygen OS custom interface. The experts within the industry are familiar with the Oxygen OS bugs & glitches. I blame the Oxygen OS for causing dramatic & petty glitches that go unnoticed by the OnePlus team.

Solution: Hard Reset Android Device.

Worst Case Scenario: Do not update the software as it invites newer & unfamiliar bugs to the arsenal.


The obsession of manufacturers to take full control over the interface, we have to bear the consequences of custom ROMS like Oxygen OS. None of the blame goes to the Official Android developers as the stock Android OS smoothen millions of consumers end-user experience. Let us know what solution worked in your favour in the comment section below.

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