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Audio streaming on mobile phone over LE audio from PDM mic interfaced to nRF5340 board.

PassionPioneer

HI Nordicsemi Team,

I am exploring how LE audio works, as far as I understand a supported mobile can be connected to nRF5340 and stream audio from mobile phone. However, for my application I need to interface PDM mic to nRF5340(this is completed), transfer PCM data over BLE to other nRF5340 board which is connected to PC and the received PCM data should be transferred to PC(over possible interface). On PC, I want to process the received PCM data into audio file.

So, I need more information whether my approach is feasible. Kindly please answer my below queries also.

Q1: Is SKD supports PCM data transfer over BLE among nRF5340 boards if so, any sample code available?

Q2: Is there feasibility to transfer PCM data from nRF5340 to PC?

Thanks in advance.

Regards,

PassionPioneer

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  • 0

    Hello,

    Q1: Is SKD supports PCM data transfer over BLE among nRF5340 boards if so, any sample code available?

    I am not sure if we have a sample for this specifically.

    But first of all, do you really need LE Audio for this? Is your end-goal having it saved as an audio file?

    Q2: Is there feasibility to transfer PCM data from nRF5340 to PC?

    Yes, you should be able to send that over I2S.

    Regards,

    Elfving

  • 0 in reply to Elfving

    Hi Elfving

    Thanks for your valuable feedback.

    I am assuming that LE audio is required because I will transfer PCM data from one nRF board to other nrRF board to which PC is connected.

    Yes, I have to save it as audio file for further process.

    Can you please elaborate how I2S can be used to send the PCM data nRF to PC.

    Regards,

    PassionPioneer

  • 0 in reply to PassionPioneer

    Hello,

    Apologies for the delay.

    If you connect the headset device to an audio input with AUX you can use the default configuration of the nRF5340 Audio application as a proof of concept. The application documentation should cover all the setup needed for you to test that, so please get familiar with it. If anything is unclear afterwards I am happy to help you.

    Regarding saving the audio in a file, I need to know more to know how to support you. Are you planning on doing further processing of the audio on the headset device or on the PC? If you are planning on processing on the headset, you need to pay attention to the required flash and RAM. If you plan to do the processing on the PC, the implementation is in your hands.

    Best regards,

    Maria

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  • 0 in reply to PassionPioneer

    Hello,

    Apologies for the delay.

    If you connect the headset device to an audio input with AUX you can use the default configuration of the nRF5340 Audio application as a proof of concept. The application documentation should cover all the setup needed for you to test that, so please get familiar with it. If anything is unclear afterwards I am happy to help you.

    Regarding saving the audio in a file, I need to know more to know how to support you. Are you planning on doing further processing of the audio on the headset device or on the PC? If you are planning on processing on the headset, you need to pay attention to the required flash and RAM. If you plan to do the processing on the PC, the implementation is in your hands.

    Best regards,

    Maria

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