Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

[deep_dive]

I have connected a Digital MIC to the nRF52833 and aim to transmit the voice data captured by the MIC via USB 2.0 Audio Class (UAC).

Upon consulting with the agency, they confirmed that while the nRF52833 does possess the necessary functionality to achieve this, there are currently no available examples or code snippets to guide implementation.

To clarify my understanding, I have the following questions:

1. Is it possible to transmit MIC-captured audio data using USB UAC with the nRF52833?

2. Are there any existing examples or sample code available for this specific implementation?

[Turbo J]

The NRF connect SDK ships with USB audio sample code (from Zephyr). NRF52833 hardware can take audio data from PDM or I²S source and transmit over USB. Needs some programming on your side

Note that there is a lot more example code for the NRF5340 as this chip can transmit audio via BTLE.

[Susheel Nuguru]

There is a sample headset for UAC1 that have only UAC1 audio IN and not playback. This is something you most likely wont be able to run on nRF52833 due to the limitations of memory on this variant. 

[deep_dive]

You mean to say that the nRF52833 can take MIC input and transmit it via UAC, but it cannot receive UAC and play it back to a speaker via I2S, right?

[deep_dive]

thank you for your answer. You mean to say that there is USB audio sample code in the SDK that can be applied to the nRF52833, right? I'm a hardware engineer, so I don't know well and want to make sure.

[Susheel Nuguru]

Hi deep_dive,

I colleague tested this and says that this sample works fine for both audio in and audio out on nRF52833