Author Topic: Audio over Bluetooth  (Read 2165 times)

0 Members and 1 Guest are viewing this topic.

Offline YU7C

  • Regular Contributor
  • *
  • Posts: 69
  • Country: cs
Audio over Bluetooth
« on: August 01, 2019, 07:42:01 pm »
Hi,

I need to transfer full audio signal (16bit 20Hz - 20kHz) from Microphone to Windows PC application over Bluetooth, and have selected Microchip BM62 Wireless module.
At the  begining everthing goes flawless: BM62 paired with BT adapter, connected and got BT microphone in Sound.
I got several BT services: Audio Sink, Handsfree Telephony, Headset,...

But audio BW is imited to about 4kHz which told me that only HFP/HSP works, not A2DP.
If I select only A2DP on BM62, then Audio Sink service is only avaliabled but  there is no sound from micropne.

I have connected elecret capsule on the microphone input of BM62.
Perhaps I need line input on BM62 for A2DP audio quality signal?

Does anyone has experinces with BM62?

Thanks,
Vojislav
 

Offline YU7C

  • Regular Contributor
  • *
  • Posts: 69
  • Country: cs
Re: Audio over Bluetooth
« Reply #1 on: August 02, 2019, 04:51:41 am »
A2DP doesn't work with microphone inputs. A2DP is for high quality playback only.

Can I use a line input for audio streaming and A2DP profile?

Thanks,

Vojislav
 

Offline YU7C

  • Regular Contributor
  • *
  • Posts: 69
  • Country: cs
Re: Audio over Bluetooth
« Reply #2 on: August 02, 2019, 05:51:43 am »
Ok, but anyway I need only one way path, from the device to PC. If it is not possible have to looking for other solution.

Thanks,
Vojislav
 

Offline Jeroen3

  • Super Contributor
  • ***
  • Posts: 3793
  • Country: nl
  • Embedded Engineer
    • jeroen3.nl
Re: Audio over Bluetooth
« Reply #3 on: August 02, 2019, 06:06:16 am »
Not only that. A2DP is also compressed, and receiving a2dp is not possible on Windows.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf