NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

Krull9 — Wed, 08 Mar 2023 19:52:23 GMT

Looking further and thinking about this more it makes a little more sense that only one stream would be output, since you wouldn't want to use both mics when they're adjacent to one another (in theory as if these were two ear buds); however, it looks as though it is hardcoded to only be output audio from the Left headset, so in the event that only the right headset is connected here will be no audio on the Gateway. Please correct me if my understanding is flawed.

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

Krull9 — Tue, 07 Mar 2023 22:01:00 GMT

[quote userid="87869" url="~/f/nordic-q-a/96907/nrf5340-audio-dk-walkie_talkie-no-bidirectional/411881"]if you substitute 'walkie talkie example' with 'the application in the PR'.[/quote]

What is the application in the PR here if not the 'nRF5340_audio' application and specifically the walkie-talkie demo portion of this application? Under the referenced PR there were changes made to the readme in the walkie-talkie demo section, notably:

"The walkie-talkie demo uses one or two bidirectional streams from the gateway to one or two headsets"

Is there a separate demo/setup of the nRF5340_audio application for True Wireless Stereo (TWS) or is it the same as the walkie-talkie demo?

Also I would like to note that, for the walkie-talkie demo, without any mention of the gateway only outputting audio from one headset it sounds as though the audio received from each headset would be mixed and output together, otherwise the 'bidirectional' part of this doesn't feel complete.

All of this in reference to nRF Connect SDK v2.3.0.

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

uzer123 — Fri, 24 Feb 2023 09:55:00 GMT

Now, it's completely clear. Thanks

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

Karl Ylvisaker — Fri, 24 Feb 2023 09:46:07 GMT

[quote user="uzer123"]i use v2.3.0-rc1 SDK version, and 3330 version of nrf5340 audio dk app (found in /bin/manifest.yaml file)[/quote]

Thank you for clarifying.

[quote user="uzer123"]I see. So, in a nutshell NRF5340 AUDIO DK in walkie-talkie example successfully receives the (mono) stream from both headsets, but in order to choose which headset i listen (as listening the left headset DK is the default), i have to implement some kind of switching myself.[/quote]

Not quite - the Walkie-talkie demo is made for communication between 2 devices. The TWS bidirectional PR you referenced is made for 3 devices. Your statement here is correct if you substitute 'walkie talkie example' with 'the application in the PR'. If you add some kind of switch to the TWS Bidirectional PR you will achieve the functionality you describe :)

Best regards,
Karl

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

uzer123 — Fri, 24 Feb 2023 09:32:14 GMT

[quote userid="87869" url="~/f/nordic-q-a/96907/nrf5340-audio-dk-walkie_talkie-no-bidirectional/411711"]Could you clarify what you mean when you say 'latest version' - does that mean you are working on the v2.2.0, or on the main branch?[/quote]

i use v2.3.0-rc1 SDK version, and 3330 version of nrf5340 audio dk app (found in /bin/manifest.yaml file)

[quote userid="87869" url="~/f/nordic-q-a/96907/nrf5340-audio-dk-walkie_talkie-no-bidirectional/411711"]Yes, you can indeed use the button 4, or something else, to implement a switch that changes which of the received streams that are output on the Headphones jack.[/quote]

I see. So, in a nutshell NRF5340 AUDIO DK in walkie-talkie example successfully receives the (mono) stream from both headsets, but in order to choose which headset i listen (as listening the left headset DK is the default), i have to implement some kind of switching myself.

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

Karl Ylvisaker — Thu, 23 Feb 2023 15:18:32 GMT

[quote user="uzer123"]Thanks for the quick response.[/quote]

No problem at all, I am happy to help!

[quote user="uzer123"]I am a bit confused by this. I have the latest app version (the bidirectional TWS PR is merged), and i still cannot listen the left headset's microphone. [/quote]

Could you clarify what you mean when you say 'latest version' - does that mean you are working on the v2.2.0, or on the main branch?

[quote user="uzer123"]The gateway indeed receives both headsets but cannot play the right because of mono hw codec?[/quote]

This is correct - there is no limitation on the nRF5340 to receive multiple streams, but the Cirrus Logic hardware codec is a mono codec, and so it only outputs mono to the Headphones jack on the Audio DK.

[quote user="uzer123"]If yes, could i use button 4 (or something else) to implement a switch between the headset's microphones (as i do for BIS headsets)?[/quote]

Yes, you can indeed use the button 4, or something else, to implement a switch that changes which of the received streams that are output on the Headphones jack.

Best regards,
Karl

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

uzer123 — Thu, 23 Feb 2023 13:00:57 GMT

Thanks for the quick response.

[quote userid="87869" url="~/f/nordic-q-a/96907/nrf5340-audio-dk-walkie_talkie-no-bidirectional/411645"]If you would like microphone return from both the peripherals then you can use this bidirectional TWS PR and enable the microphones on both headset devices.[/quote]

I am a bit confused by this. I have the latest app version (the bidirectional TWS PR is merged), and i still cannot listen the left headset's microphone.

So according to this:

[quote userid="87869" url="~/f/nordic-q-a/96907/nrf5340-audio-dk-walkie_talkie-no-bidirectional/411645"]If you wish for it to switch to another headset as the bidirectional source you must implement some logic for this switch.[/quote]

The gateway indeed receives both headsets but cannot play the right because of mono hw codec?

If yes, could i use button 4 (or something else) to implement a switch between the headset's microphones (as i do for BIS headsets)?

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

Karl Ylvisaker — Thu, 23 Feb 2023 12:21:14 GMT

[quote user="uzer123"]But i guess this cannot work, as gateway cannot change to listening the right headset? [/quote]

Correct, the walkie-talkie demo is only made for 1 headset, and bidirectional between them.
If you wish for it to switch to another headset as the bidirectional source you must implement some logic for this switch.

[quote user="uzer123"]So, i could have proper walkie-talkie between left and gateway. Should this work for walkie-talkie also?[/quote]

If you would like microphone return from both the peripherals then you can use this bidirectional TWS PR and enable the microphones on both headset devices.
However, please keep in mind that the nRF5340 Audio DK only outputs mono audio through its HEADPHONES jack, and so you will have to choose which of the streams you output to your headset, unless you have an external stereo codec available.

Best regards,
Karl

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

uzer123 — Thu, 23 Feb 2023 08:53:35 GMT

OK, it looks i missed the "Only one headset device can be connected when testing the bidirectional mode or the walkie-talkie demo." And i was trying only between gateway and right headset (like this). But i guess this cannot work, as gateway cannot change to listening the right headset?

So, i could have proper walkie-talkie between left and gateway. Should this work for walkie-talkie also?

RE: NRF5340 AUDIO DK: WALKIE_TALKIE no bidirectional

Karl Ylvisaker — Wed, 22 Feb 2023 13:59:33 GMT

Hello,

I just tested this on the nRF Connect SDK v2.2.0 without any issues, only adding CONFIG_WALKIE_TALKIE_DEMO=y to the default nrf5340_audio application. I am able to hear the output from the other microphone on both the devices.

You mention that you are using v2.3.0 which has not been released yes, are you testing this on the release candidate, or on main? In case of the latter, which commit ID are you testing this on?

Best regards,
Karl