How to achieve bidirectional stream in CIS mode with LE-Audio?

RE: How to achieve bidirectional stream in CIS mode with LE-Audio?

Karl Ylvisaker — Fri, 26 Apr 2024 13:23:19 GMT

Hello,

[quote user="Junichi"]Thank you Karl[/quote]

No problem at all! :)

[quote user="Junichi"]

I tried setting CONFIG_BT_VCP_VOL_REND, but the volume on the gateway side did not change as expected.

Looking at the source, it seems that the only thing that can be done is to change the volume on the headset side.

Does this need to change?

[/quote]

The volume control is by default enabled in the unicast configuration of the nRF5340 LE Audio reference application - do you not see the button presses reflected in the output volume and in the logs when you press them?
If you do not, could you elaborate on what your logs say when you attempt to adjust the volume using the DK buttons?

Best regards,
Karl

RE: How to achieve bidirectional stream in CIS mode with LE-Audio?

Junichi — Thu, 18 Apr 2024 02:49:01 GMT

Thank you Karl

I tried setting CONFIG_BT_VCP_VOL_REND, but the volume on the gateway side did not change as expected.

Looking at the source, it seems that the only thing that can be done is to change the volume on the headset side.

Does this need to change?

RE: How to achieve bidirectional stream in CIS mode with LE-Audio?

Karl Ylvisaker — Wed, 17 Apr 2024 08:07:09 GMT

Hello,

I am glad to hear that you now have it working as intended! :)

[quote user="Junichi"]However, even if you press the volume button on the headset or gateway,
Only the headset volume changes.
It seems that the source itself is configured like that, but on the gateway side
I don't know which part of the source I should change to change the volume.[/quote]

Have you made sure to set CONFIG_BT_VCP_VOL_REND in your project? This will add the Volume Control Profile to your project, which is used to change the volume. This is enabled by default in the nRF5340 LE Audio reference application.

Best regards,
Karl

RE: How to achieve bidirectional stream in CIS mode with LE-Audio?

Junichi — Wed, 17 Apr 2024 00:24:34 GMT

Thank you Karl

Was self resolved.

CONFIG_STREAM_BIDIRECTIONAL=y
When you set , you can see that the microphone on the board is enabled,
By changing the source where the microphone is enabled to line input
As expected, we were able to communicate with each other.

However, even if you press the volume button on the headset or gateway,
Only the headset volume changes.
It seems that the source itself is configured like that, but on the gateway side
I don't know which part of the source I should change to change the volume.

Please teach me.

RE: How to achieve bidirectional stream in CIS mode with LE-Audio?

Karl Ylvisaker — Mon, 15 Apr 2024 09:23:28 GMT

Hello,

What will be the contents of the return stream? Do you intend to send the microhpone data, or data from another source?
If you intend do send microphone data in the return stream from the headset device you could start out with the walkie talkie demo as suggested by Henrik.

Best regards,
Karl

RE: How to achieve bidirectional stream in CIS mode with LE-Audio?

Hejdern — Mon, 15 Apr 2024 08:29:20 GMT

I guess the "CONFIG_WALKIE_TALKIE_DEMO" should be set to "y"!

Rgds,

Henrik