Making a 5.1 home-theater-like system with nRF54l15 DK

RE: Making a 5.1 home-theater-like system with nRF54l15 DK

fbox — Fri, 07 Feb 2025 15:30:20 GMT

Thank you for your answer, it is clear for me.

Have a nice day

RE: Making a 5.1 home-theater-like system with nRF54l15 DK

dejans — Fri, 07 Feb 2025 15:09:40 GMT

Hi Fred,

I have edited my previous reply. Please have a look at it again and let me know if you have any further questions.

Best regards,
Dejan

RE: Making a 5.1 home-theater-like system with nRF54l15 DK

fbox — Fri, 07 Feb 2025 14:51:47 GMT

Hi Dejans,

Thank you for the quick answer.

Unfortunately I am not sure it answers my question or maybe I didn't understand the answer. In my use-case I wont need any mic and wont use headsets.

It is going to be a source (computer, phone, soundbar, AV Receiver etc.) that will send a multi-channel audio signal to different sinks/receivers (nRF534 Audio Dev Kit/or other, Bluetooth speakers etc.). Each sink will play one channel of the audio signal that will be sent by the source. As for a Stereo signal, the signal played by each sink could be different so the Broadcast application of BLE Audio doesn't apply in my case. Ideally I would like to send a 5.1 audio signal to 6 different sinks that are going to be synchronized (the 6 channels sent being : Front left, Front right, Center, Surround left, Surround right and Subwoofer).

I wanted to know if my use-case could be answered with one of your dev kit boards using BLE Audio (no Wifi or proprietary protocol) and if there were a limitation in the number of channels that could be sent to the sinks (I would like 6 channel, but if only 4 are possible, I can try workarounds to fulfill my needs.

Thank you in advance for your help.

Fred

RE: Making a 5.1 home-theater-like system with nRF54l15 DK

dejans — Fri, 07 Feb 2025 14:31:38 GMT

Hi,

You should consider the following regarding the use of nrf5340:
1. CPU usage - it is required around 33% of the nrf5340 CPU for encoding one channel stream of high quality (48 KHz, 96 Kbps). Having 3 channels might already be stressful for nrf5340 CPU.
2. If I2S is input interface, it supports only 2 channels
3. Establishing 3 streams might be possible using broadcast nrf_auraconfig (as it does not stress CPU), but this would require testing and use of sniffer to check on-air timing, and you might need your own BIS receiver for handling receiving side.
With regard to audio support on nrf54l15 and nrf54h20 and applicability to your use case, please contact your regional sales manager.

Best regards,
Dejan