Oasis Plus - Troubleshooting - Not working / No sound


Keywords: Oasis Plus, No Sound, not working, broken, defective

If you want to stream audio from your Non-Bluetooth TV or other devices, Oasis serves as a Bluetooth transmitter (TX). Troubleshooting steps are summarised below and details following:

  1. Settings and connections all correct? 
  2. Audio Source working? 
  3. Paired successfully with Bluetooth device?

1. Connection & Setting 

Is your Bluetooth device and Oasis Plus are well connected? To confirm this, pls turn off the Bluetooth device and see whether the A or B LED on Oasis Plus is gone. If not, pls clear the pairing history and try to pair them again. 

When properly connected, the setting should be - 

Slide Mode switch to the "TX" position

Make sure your cable is connected to "TX Input / From TV " jack at the back of Oasis.

USB cable is powering up the device

2. Proper Audio Source?  

2.1. RCA / AUX connection

  1. The most OFTEN mistake when using RCA / AUX connection from TV is - you connected to TV RCA audio in rather than audio out. If your TV RCA is NOT marked as 'RCA OUT' then most likely it is audio IN so it not the right port to use. To make sure your audio out is working properly, please use a wired headphone to test and make sure yon can hear proper sound.


2. Make sure your cable is connected to "TX Input / From TV " jack at the back of Oasis. 

3. Make sure you change your TV audio OUT setting to "External Speakers" (if using RCA Audio OUT ) see below

or "Headset" (if using AUX/3.5mm OUT), see below

4. If you have tried the above mentioned four steps and still not hear sound under AUX connection or only hear sound from one channel/ ear, while the optical connection works, then this Oasis shall be a defective one( AUX jack is broken). In that case, please email to support@avantree.com for a replacement.

2.2. Optical Connection 

1. Make sure optical cable connection / OPT is selected on Oasis.  Opt is effective when AUX cable is not plugged in.

2. Make sure you change your TV audio OUT setting to "External Speakers"

3. If your TV audio source is Dolby or DTS (mostly from Netflix, Amazon prime, Hulu, etc.) please change your audio format to PCM. Oasis Plus supports the PCM audio format only, it doesn't support Dolby, DTS. 

Generally the setting should be under your TV's sound settings menu though the exact location may vary between different TVs - please refer to your TV's manual.

Go to Menu-> sound setting -> Digital (SPDIF) audio output->audio format-> set to PCM

e.g. How to set my Samsung TV digital audio out to PCM --

Home>>Settings>> Sound>> Expert Settings>>Audio format>>PCM.

If it still doesn't work or some audio format can not set to PCM, please purchase an additional Dolby/DTS Digital to analog converter, For example:


To lear more details, you can click below:

Oasis (Plus) - Troubleshooting - Why I can not get audio from all sources (Netflix, Apple TV, Amazon FireStick, etc)?

4. If you have never used your optical port before, there is a chance that your optical port is not working properly. You can check the audio output with an optical supported sound bar or speaker - connect the optical cable from TV to your sound bar and make sure you can hear proper music. Or you can plug Oasis plus to another TV and try. In  some cases, your TV optical port is not working.

5. Sometimes a bad cable could be the cause of all the trouble. Pls also try with a different audio cable or test the cable works well with other devices. 

6. Make sure your HDMI ARC port is not connected. Otherwise, TV will send audio out to ARC port first sometimes. If you need to use HDMI port, pls use those without ARC mark. e.g. below not use HDMI2 below. 

3. Paired with your Bluetooth device successfully? 

If yes, then the LED screen should show as TX | OPT or AUX | SBC or aptX or LL or HD | A


Oasis Plus should say - "Connected. Ready for use".

If you want to make sure the connection is well established, you may turn off the Bluetooth device and LED A should immediately disappear from Oasis screen. This confirms Oasis is connected to that Bluetooth device correctly. Then turn the bluetooth back on and you should hear Oasis announces "Connected. Ready for use".  

If you have difficulty here, refer to FAQ -

switch between AUX and OPT. 

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