Multiple BLE audio source(Mic) with single BLE audio sink

RE: Multiple BLE audio source(Mic) with single BLE audio sink

Elfving — Wed, 09 Oct 2024 11:58:22 GMT

Hello Sanjay,

Maybe it would be best to start a new case with this.

I am not sure exactly what you are asking about here, but many things have been improved and changed since the start of this thread. Though what is still the same is that the Thingy doesn't support this, and not all smart phones support this either.

Regards,

Elfving

RE: Multiple BLE audio source(Mic) with single BLE audio sink

SNJY — Mon, 07 Oct 2024 19:36:20 GMT

Is there a working example/demo for this scenario now? I am working on a similar use case and wanted to know if this is implemented.

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Mon, 27 Nov 2023 09:53:15 GMT

Hi Selvaraj

The Thingy:53 doesn't support this, no. For LE Audio testing it is recommended to get the nRF5340 Audio DK.

If you have more questions about this please open a new ticket.

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

Selvaraj — Sat, 25 Nov 2023 11:08:36 GMT

Hi,

I would like to record audio in mobile phone via BLE? Does Thingy 53 support BLE audio transfer to smart device from microphone in Thingy53 ?

If yes where I could find the example for the same both firmware and the app (android or iOS).

Best Regards,

Selvaraj

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Tue, 07 Feb 2023 17:14:08 GMT

I didn't realize it was possible to merge compressed LC3 data? But then again I don't know the codec specifics that well.

Looking at the sd_codec_select.c implementation it seems it already supports decoding two parallel channels, when running the module in stereo mode. Please have a look here:
https://github.com/nrfconnect/sdk-nrf/blob/main/applications/nrf5340_audio/src/audio/sw_codec_select.c#L151-L183

Wouldn't you be able to do something similar?

Essentially you can run the sw_codec_lc3_dec_run(..) function as many times as you like (only limited by available CPU time), and provide separate buffers.

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Tue, 07 Feb 2023 12:39:54 GMT

Hi Gaurav,

Thank you for your response.

Right now we are working with 2 microphone and succeeded by receiving mic data from 2 servers to client.

The receiving mic data packets are merging since we have single receiving buffer in this example, hence we are getting noisy audio out. If we know how use independent decoder for each mic, hope will succeed with 2 mic.

Best Regards,

Chethan kumar

RE: Multiple BLE audio source(Mic) with single BLE audio sink

Gaurav Kapoor — Tue, 07 Feb 2023 11:56:24 GMT

Hi Chethan

Since you want to transfer audio from four microphones to a central device. This is not something that we in the project have worked yet. It is also outside the current official specifications for the controller, which is limited to two CISes. So we can not guarantee that this will work, and we can not officially support it (yet). This may be something that we will officially support in the future, but we have no committed plans for that yet. That being said, the scenario is reasonable, as long as the bitrate and the number of retransmissions is kept within what radio airtime and scheduling allows (sorry, no concrete limits). Extending the application to add two more devices is your scope of work for now. Unfortunately we cannot help more on this much and All the best for you to try out

tks

Gaurav

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Mon, 06 Feb 2023 04:49:34 GMT

Hi Torbjørn,

As discussed with Gaurav, please update if you get any information on this requirement.

Best Regards,

Chethan kumar

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Fri, 03 Feb 2023 03:53:20 GMT

Thank you

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Thu, 02 Feb 2023 15:02:18 GMT

I shared it by PM. Sorry for the delay....

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Thu, 02 Feb 2023 04:52:57 GMT

Hi Torbjørn,

Can you please share the regional sales director details?

Best Regards,

Chethan kumar

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Tue, 03 Jan 2023 14:10:09 GMT

Hi Chethan

I will check with the team if they can share a schedule.

In the mean time you might want to forward your requirements to our regional sales director for your region as well. If you don't know who this is just let me know, and I will forward you the details.

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Mon, 02 Jan 2023 12:01:16 GMT

Hi Torbjørn,

Thank you for your response.

Can you suggest when we can expect?

We are doing uni-direction and we are able to receive the data from the 2 servers but don't have idea to decode individual peripherals.

Best Regards,

Chethan kumar

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Mon, 02 Jan 2023 11:48:15 GMT

Hi Chethan

This is a known limitation in the current implementation.

We are planning to support this in the future, but apparently the team is working on some improvements on the Zephyr side in order to properly support this. In other words it might take some time until this is available...

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Fri, 30 Dec 2022 08:39:52 GMT

Hi Torbjørn,

Now we are able to receive the mic data from 2 headset to gateway but we are getting "Duplicate sdu_ref_us - Dropping audio frame" warning and able to decode only one headset mic data in gateway.

Can you please help us how to decode 2 headset mic data in gateway.

Best Regards,

Chethan kumar

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Wed, 16 Nov 2022 08:04:44 GMT

The audio will be full duplex, yes. You can send and receive at the same time.

You will also be able to have a normal Bluetooth connection between the phone and the nRF53 while the audio streams are active, yes.

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

Epasta — Tue, 15 Nov 2022 14:28:57 GMT

Hi,

with this example, that will be available in December the audio is only half-duplex or will be also full duplex?

with this example is it possible also keep the phone connected to one NRF53?

Thanks
Best regards

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Fri, 11 Nov 2022 09:00:22 GMT

Hi Chethan

It seems the bi-directional solution is already available in the v2.1.99 branch, and you can start by having a look at this:
https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/applications/nrf5340_audio/README.html#selecting-the-cis-bidirectional-communication

Then you can start getting familiar with it before the full v2.2 release is ready next month.

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Thu, 10 Nov 2022 08:52:31 GMT

Hi Torbjørn,

Ok, Please ask and suggest us. We required only mic audio stream from server to client.

Best Regards,

Chethan kumar

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Thu, 10 Nov 2022 08:46:34 GMT

Hi Chethan

I will ask the team if they can provide some instructions, but I think you might have to wait for the December release in order to have a reference for implementing bi-directional audio (or mic only).

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Tue, 08 Nov 2022 11:57:14 GMT

Hi Torbjørn,

Thank you for your information.

For us uni-direction(Audio Stream from Headset to Gateway) is enough. Only audio streaming direction need to be change.

Can you please help us what are the changes required in the le_audio_cis_headset.c and le_audio_cis_gateway.c file?

Best Regards,

Chethan kumar

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Tue, 08 Nov 2022 11:47:37 GMT

Hi Chethan

Bi-directional audio should be included in the NCS 2.2.0 release, which should be out early December.

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Mon, 07 Nov 2022 06:46:42 GMT

Hi Torbjørn,

This firmware is having pairing issue, still bi-directional audio not supported in SDK 2.1.2.

Best Regards,

Chethan kumar

RE: Multiple BLE audio source(Mic) with single BLE audio sink

ovrebekk — Thu, 27 Oct 2022 07:09:16 GMT

Hi Chethan

There are some updates coming in the nRF Connect SDK to support bi-directional audio, and you can take a look at it already by checking out the following two PR's:
https://github.com/nrfconnect/sdk-nrf/pull/8915
https://github.com/nrfconnect/sdk-nrf/pull/9003

Please note that multiple receive channels will not be supported by these enhancements.

Best regards
Torbjørn

RE: Multiple BLE audio source(Mic) with single BLE audio sink

chethan26 — Tue, 25 Oct 2022 06:24:10 GMT

Hi Torbjørn,

Thank you.

I will be waiting for your suggestion.

Best Regards,

Chethan kumar