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How to change BT module audio gains and Hands Free Settings

Change The BT module audio gains

All of our Bluetooth audio amplifier boards and Bluetooth audio receiver boards use AudioB plus module as the core bluetooth receiver module. If you have to use a mismatch speakers or power supply in your system(size limit or other reasons). You may want limit the maximum output audio gains toĀ avoid theĀ distortion on high volume.Ā All our amplifier boards have a programming port on it. You can change the BT Audio gains by yourself.

Change hands free settings.

The bluetooth module default settings is hands free enabled. When your smartphone connected with the bluetooth amplifier. If you have a phone call come in. It will ring loud through the speakers. Some users don’t like it. You can change this settings by yourself.

Hardware and Software required:

 

Step1:

Connect the CSR USB-SPI programmer and Tag-Connect line with a AudioB Plus convert board, then connect CSR USB-SPI to your computer by a mini USB cable and windows will auto detect it and install the drivers.

Step2:

Connect TC2050-IDC-NLā€™s connector to AudioB plus programming port. You need to locate the single steel alignment pin of the connector into the single hole of the PCB footprint, then press down softly to engage the spring-pin contacts. Make sure the first 6 pins have a good contact with the corresponding pads. Then the blue led and red led will flashes alternately.

 

Change The BT module audio gains:

Step3:
MakeĀ sureĀ theĀ connectionĀ isĀ fine,Ā thenĀ openĀ Config Tool.ClickĀ “Open From Device “,then Make sure that the values of the ā€œDefault A2DP Volume Levelā€ and the ā€œDefault Volume Level ā€œ options are all values of HFP15. If not, please modify to HFP15.

Step4:
Select “Audio Gains ” tab, There are ā€œSpeak Gain(dB)ā€ and ā€œA2DP Gain(dB)ā€ settings in this page. Here we only need change the ā€œA2DP Gain(dB)ā€ values. If you use an iPhone, You can find there are 15 volume levels on iOS system(Android are different). HFP1 is the start levelĀ audio volume, HFP15 is maximumĀ audio volume, If you want limit theĀ maximumĀ audio volume. Just adjusting theĀ corresponding HFP gain values.

 

Step5:

After the modification is completed, click on the right side of the ā€œWrite Deviceā€. The module settings changed after reboot.

 

Change hands free settings.

Step3:
MakeĀ sureĀ theĀ connectionĀ isĀ fine,Ā thenĀ openĀ Config Tool.ClickĀ “Open From Device “, HFP features tab->uncheck the HFP,HSP and WBS option.

Step4:

After the modification is completed, click on the right side of the ā€œWrite Deviceā€. The module settings changed after reboot.


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