The nrf5340 audio application's TX function of Gateway

RE: The nrf5340 audio application's TX function of Gateway

huma — Wed, 14 Aug 2024 06:20:22 GMT

Hello Amanda,

Thank you very much!

I found a way to implement it, not perfect.

I need more test on it, if there is some problem, i will back to ask you.

Thank you!

RE: The nrf5340 audio application's TX function of Gateway

huma — Tue, 13 Aug 2024 14:28:04 GMT

Hello Amanda,

Sorry, i found i used the wrong command to build the project.

Now, i am using the v2.7.0. Thank you very much!

But there is still the problem:

It printed by the headset. And i have checked that the gateway is correctly configured.

I think the headset also need disable the RX function, because i found that there is always allocate the resource for the RX function in the headset.

And if i modify the ".codec_cap = &lc3_codec_sink," to ".codec_cap = NULL,", or modify the "

CONFIG_BT_ASCS_ASE_SNK_COUNT=0" to disbale the RX function of headset, it will be crashed:

So how can i only allocate resource for the TX function in the headset?

Thank you very much and looking forward to your reply!

RE: The nrf5340 audio application's TX function of Gateway

Amanda Hsieh — Mon, 12 Aug 2024 16:54:18 GMT

Hi,

[quote user="huma"] in the past, i have tried V2.7.0, seems the nrf5340 audio application has something wrong? Because when i burned the default CIS headset project, it will crash, as follow:[/quote]

What is the command you use to build the audio application? Could you provide the instruction to help us reproduce?

I use "west build -b nrf5340_audio_dk_nrf5340_cpuapp -p -d headset -- -DCONFIG_AUDIO_DEV=1" to build and get

[quote user="huma"]

Does that means i can not use vscode to build the project?

So i still use the V2.6.0.

[/quote]

No, Building and programming using the nRF Connect for VS Code extension is currently not supported as the note indicated even on NCS v2.6.0.

-Amanda H.

RE: The nrf5340 audio application's TX function of Gateway

huma — Fri, 09 Aug 2024 00:52:18 GMT

Hello Amanda,

Thank you very much!

Yes, i want to send a stereo audio stream from headset to the gateway, at least one headset, two is better. And the important thing is i want the LC3 codec use 48K sampling rate.

And by the way, in the past, i have tried V2.7.0, seems the nrf5340 audio application has something wrong? Because when i burned the default CIS headset project, it will crash, as follow:

I have noticed that:

Does that means i can not use vscode to build the project?

So i still use the V2.6.0.

Thank you very much and looking forward to your reply!

RE: The nrf5340 audio application's TX function of Gateway

Amanda Hsieh — Thu, 08 Aug 2024 12:57:11 GMT

Hi,

The solution is based on v2.7.0 to disable the TX on the gateway and only keep the streams from the headset to the gateway.

In the default setting, the headset will only send one stream (the left channel) to the gateway.

Would you want to send a stereo audio stream from each headset to the gateway?

-Amanda H.

RE: The nrf5340 audio application's TX function of Gateway

huma — Wed, 07 Aug 2024 03:09:56 GMT

Hello Amanda,

I have tried following your instructions.

I also enable the "CONFIG_BT_AUDIO_PREF_SAMPLE_RATE_48KHZ=y"

Then the headset device will print:

I found that the size is still 120 and not 240:

So, how can i increase the size to 240? I think may be i also need to modify the headset code.

Thank you very much and looking forward to your reply!

RE: The nrf5340 audio application's TX function of Gateway

huma — Fri, 02 Aug 2024 13:41:52 GMT

Hello Amanda

Thank you very much!

I will try it when i back to office. Then will report the result!

Thank you!

RE: The nrf5340 audio application's TX function of Gateway

Amanda Hsieh — Fri, 02 Aug 2024 12:34:47 GMT

Hi,

You can

Since CONFIG_STREAM_BIDIRECTIONAL=y will enable the encoder on headset side and also the decoder on gateway, so please enable it
For unciast client, only discover the UNICAST_SERVER_SOURCE
- ret = unicast_client_discover(msg->conn, UNICAST_SERVER_BIDIR);
+ret = unicast_client_discover(msg->conn, UNICAST_SERVER_SOURCE);
https://github.com/nrfconnect/sdk-nrf/blob/5aa5ca0c13de5b6f0c7acf28ef96b307632fb91e/applications/nrf5340_audio/unicast_client/main.c#L397
For unicast client in the current code (will improve in later)
The unicast client will try to allocate the resource for CIG in the start from here
https://github.com/nrfconnect/sdk-nrf/blob/5aa5ca0c13de5b6f0c7acf28ef96b307632fb91e/applications/nrf5340_audio/src/bluetooth/bt_stream/unicast/unicast_client.c#L1766
Please try to set the tx_param in here to NULL for a trial
https://github.com/nrfconnect/sdk-nrf/blob/5aa5ca0c13de5b6f0c7acf28ef96b307632fb91e/applications/nrf5340_audio/src/bluetooth/bt_stream/unicast/unicast_client.c#L1784
So the gateway will only allocate the time for RX not TX
The headset should also expose the support/available context properly
https://github.com/nrfconnect/sdk-nrf/blob/b83837fb1f9630139b8a372778acc95fc2524073/applications/nrf5340_audio/src/bluetooth/bt_stream/unicast/unicast_server.c#L56

-Amanda H.

RE: The nrf5340 audio application's TX function of Gateway

huma — Fri, 02 Aug 2024 01:04:58 GMT

Hello Amanda

Yes, i want to disable the stream from the gateway to the headset but I want to keep stream from the headset to the gateway.

In reality, I'm guessing that when I can only keep the stream from the headset to the gateway, the system will automatically allocate all resources to this path, just like when "CONF_STREAM_SIDIELECTION" is not enabled, all resources will be allocated to the stream from the gateway to the headset.

I'm not sure if my guess is correct. I'm not sure if my guess is correct, but it's worth giving it a try.

Thank you very much and looking forward to your reply!

RE: The nrf5340 audio application's TX function of Gateway

Amanda Hsieh — Thu, 01 Aug 2024 18:14:17 GMT

Hi,

Would you like to disable the stream from gateway to headset, or headset to gateway?

Regards,
Amanada H.