Windows 10: Multiple streaming interfaces on USB Audio 2.0-compliant device not functional simultaneously

I'm currently developing a new hardware device that implements the USB Audio 2.0 class. It includes two streaming interfaces for receiving audio from the host computer, and one additional interface for sending audio to the host. I can send and receive audio to the device through a pair of the in/out interfaces, but when I try to add the second out interface, it simply doesn't work. When running diagnostics on the device, I can see that Windows is sending SET_INTERFACE requests to only enable one interface at a time. Both interfaces will send audio from the host to device, but only if the other

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Windows 10 simultaneous A2DP streams playing different Audio?

Dear Darshan,

thank you for your reply!

I'm using

• a Samsung Notebook Type NP700Z7C-S01DE
• Windows 10 Pro, Version 1511, Build 10586.545
• with an integrated Intel Wireless Bluetooth Adapter (Driver Version 18.1.1525.1445)
• Microsoft Bluetooth LE Enumerator Version 10.0.10586.212
• Microsoft Bluetooth LE Enumerator Version 10.0.10586.545
• and two Bluetooth-Audio Modules
  • Manufacturer: Microchip
  • Name: RN-52-EK (Evaluation Boards)
  • They use Microsoft Driver Version 10.0.10586.545

These Bluetooth Modules (referred to "Module 1" and "Module 2" in my initial post) provide (among others) the Bluetooth A2DP profile and therefore are registered in the PC as Sound Devices (Headsets):









Now the situation is as follows:

• Both RN52 work fine
  
• I can select either of them or the Notebooks Realtek Soundcard as standard

However, my intention is to use BOTH RN52 simultaneously. I'm evaluating the possibility to use multiple Bluetooth Sound Devices at the same time to build a Windows based Multichannel Audio System.
We need to play different Audio Streams on different Bluetooth-Sound-Devices Simultaneously.

I've successfully tested to

• use one RN52 Module as Standard Sound Device and play some Audio via Mediaplayer
• SIMULTANEOUSLY use Audacity Sound Application to play another wav-File through the Realtek Soundcard of my Notebook

The Problem is: as soon as I switch Audacity to the second RN52-Bluetooth Sound Device, the Sound Output gets corrupted (sounds like sampling hangs).

I suspect that the Windows bthA2DP.sys Driver does not support simultaneous use of multiple Bluetooth-Audio-Devices. Can you confirm this or is it possible to implement a multichannel sound device on windows using multiple Bluetooth-A2DP Devices?

BR

Sven

 

Windows 10 simultaneous A2DP streams playing different Audio?

Hello,

I'm trying to use multiple Bluetooth Audio Modules (Microchip RN52) SIMULTANEOUSLY on Windows 10.

- I can pair & connect these modules

- I can switch the standard audio output from one module to the other

However, when I try to play audio through Module-1 and play other Audio (e.g. with audacity) to Module-2, I get noise that sounds like corrupted sampling rate or so...

On the other Hand, I can play sound through the Bluetooth Module and at the same time stream different Audio through the Realtek Soundcard in my notebook without any problems.

So I'm wondering if it is possible to use multiple Bluetooth Audio Modules synchronously to play different Audio Streams?

Thank You,

Sven

 

Multichannel audio interface in/out routing

Hi Paulo,



Thank you for writing to Microsoft Community forums.

• What is the make and model of your external audio interface?
• Which routing application are you using?

The configurations of inputs and outputs on any audio interface is dependent on the hardware and its supporting software. Any audio interface with more than 2 inputs and 2 outputs, should ideally give the user an option to map the
Input and Output Config, according to his interest.



I suggest you to go through the user manual provided by your audio interface's manufacturer to know how to set up the control surface.



If it doesn't explain how to configure, I suggest you to get in touch with the audio interface's manufacturer to know how to configure the same.



Hope it answers.

Regards,