Optional Patch for Oasis Plus (TC500P) - Get rid of "Crackling Noise" on aptX Low Latency Headphones – Avantree Support

Oasis Plus: Fix Crackling Noise on aptX Low Latency Headphones

An optional firmware patch is available for certain Avantree Oasis Plus (TC500P) units experiencing crackling noise when used with aptX Low Latency headphones.

This update is optional and should only be performed after consulting Avantree Technical Support.

IMPORTANT: Contact Avantree Support BEFORE Updating

Do not install this firmware patch without first consulting Avantree Technical Support.

An incorrect firmware update (DFU) procedure can cause your Oasis Plus to stop working. According to Avantree's firmware disclaimer, damage caused by an unauthorized or incorrectly performed DFU upgrade may not be covered by the warranty.

Contact Avantree Support Before Proceeding

Firmware Patch Information

Product Avantree Oasis Plus (TC500P)

Firmware Version TC500P FS priority

Release Date October 19, 2020

Applicable LOT Number 20D2 and later

Fix Crackling noise with aptX Low Latency headphones

Before You Start: Is This Patch Applicable?

Product Model

Your device is Oasis Plus (TC500P).

LOT Number

Your device's LOT number is 20D2 or later. Ask Avantree Support if you are unsure.

Reported Issue

You experience crackling noise when using aptX Low Latency headphones.

Support Approval

Avantree Technical Support has confirmed that you should install this patch.

Not Sure About Compatibility? If your product model, LOT number, or symptoms do not match the information above, contact Avantree Support instead of proceeding with the firmware update.

1 Firmware File

2 Enter DFU Mode

3 Perform Update

STEP 1 OF 3

Download the Firmware File

After Avantree Support confirms that the patch is suitable for your Oasis Plus, download the firmware file to your computer.

TC500P FS priority

Optional firmware patch for Oasis Plus (TC500P)

VIEW OFFICIAL FIRMWARE FILE

Important: Save the downloaded firmware file to a location you can easily find, such as your Downloads folder.

Do Not Open the Firmware File Directly

The firmware file is intended to be selected from the DFU upgrade software. You do not need to open it by double-clicking.

Support Approval Required

If Avantree Support has not approved this firmware patch for your device, do not continue to the next step.

Step 1 of 3 Next →

STEP 2 OF 3

Put Oasis Plus into DFU Mode

Connect Oasis Plus to your computer using a Micro USB data/sync and charging cable.

Use a USB Cable That Supports Data Transfer

The USB cable supplied with Oasis Plus is intended for charging only. It cannot be used for the firmware update.

Use a Micro USB cable that supports both data transfer and charging.

With Oasis Plus powered on, press and hold these two buttons simultaneously:

Bluetooth Pairing

AUX

AUX / OPT

HOLD BOTH BUTTONS FOR 8 SECONDS

Continue holding until all LED indicators turn off.

Expected Result: All LEDs OFF

All indicators should be off when the device enters DFU mode.

Do Not Disconnect the USB Cable while following the firmware update instructions provided by Avantree Support.

← Back Step 2 of 3 Next →

STEP 3 OF 3

Perform the Firmware Update

Follow Avantree's official Device Firmware Update (DFU) instructions for your computer's operating system.

Select Windows PC or Mac Computer below to open the corresponding step-by-step guide.

Windows PC

Follow the step-by-step Bluetooth device firmware update instructions for Windows.

WINDOWS DFU GUIDE

Mac Computer

Follow the step-by-step device firmware update instructions for macOS.

MAC DFU GUIDE

Before Starting the Update

Make sure Avantree Support has confirmed that the firmware patch is suitable for your Oasis Plus (TC500P).

Select the guide that matches your computer and follow its instructions carefully.

Important During the Update

Do not disconnect your Oasis Plus or interrupt the firmware update unless the official instructions specifically tell you to do so.

After the Update: Once the official DFU procedure confirms completion, follow Avantree Support's instructions to reconnect your headphones and test whether the crackling noise has been resolved.

← Back Step 3 of 3 Start Over

Common Questions

Do I Need to Install This Firmware Patch?

Not necessarily. This is an optional patch intended to address crackling noise when Oasis Plus is used with aptX Low Latency headphones.

Contact Avantree Support to confirm whether the patch is appropriate for your particular device and issue.

Which Oasis Plus Units Are Eligible?

The original firmware article lists Oasis Plus (TC500P) with LOT number 20D2 or later.

Avantree Support should verify your device before you proceed.

Can I Use the USB Cable Included with Oasis Plus?

No. According to the original article, the supplied USB cable supports charging only.

For the firmware update, use a Micro USB cable that supports data transfer.

How Do I Know Oasis Plus Has Entered DFU Mode?

With the device connected to your computer using a suitable Micro USB data cable, power it on.

Press and hold the Bluetooth Pairing and AUX / OPT buttons together for approximately 8 seconds.

The original guide identifies all LED indicators turning off as the expected DFU mode indication.

Can I Open the Firmware File After Downloading It?

Do not open the firmware file directly.

Save it to your computer and select it when instructed by the DFU software.

Where Can I Find the Windows Firmware Update Guide?

Follow Avantree's official step-by-step firmware update guide for Windows PC.

Open Windows DFU Guide

Where Can I Find the macOS Firmware Update Guide?

Follow Avantree's official step-by-step firmware update guide for macOS.

Open macOS DFU Guide

What If My Oasis Plus Stops Working During the Update?

Stop attempting additional firmware updates and contact Avantree Technical Support.

The original article warns that an incorrect DFU procedure may cause the product to stop working and may affect warranty coverage.

Need Help with the Firmware Patch?

Before attempting the update, contact Avantree Support with your Oasis Plus model, LOT number, headphone model, and a description of the crackling noise.

ASK A QUESTION