Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

Susheel Nuguru — Fri, 04 Apr 2025 05:34:03 GMT

Sorry deep_dive foro delayed reply.

Yes it should be possible to have both audio out and audio in simultaneously but this might be tricky with throughputs as there is a single core on nRF52833 to do pre and post processing of data. You can configure both I2S RX and TX for duplex audio between peripherals and combine PDM input with I2S output

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

deep_dive — Wed, 02 Apr 2025 00:35:48 GMT

hi susheel.

Please check my asks as time allows

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

deep_dive — Mon, 31 Mar 2025 00:59:04 GMT

I want to clarify something. You said, 'There is a sample headset for UAC1 that has only UAC1 audio IN and not playback.' Does that mean that the speaker output works but the microphone input does not? You mentioned that both are possible through the test, but I want to be clear about which one is fundamentally supported between the speaker and the mic. According to you, there could be issues due to the limitations of memory on this variant, so I want to clearly understand what is fundamentally possible.

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

deep_dive — Mon, 31 Mar 2025 00:54:48 GMT

Hi Susheel

I want to clarify one thing. Is it possible to transmit audio in and audio out simultaneously on the nRF52833? Or does it mean that audio in and audio out can be transmitted on separate systems?

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

deep_dive — Wed, 26 Mar 2025 07:40:44 GMT

Thank you. I understand that using the nRF52833, both MIC input and I2S Speaker output can be transmitted via UAC."

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

Susheel Nuguru — Wed, 26 Mar 2025 07:37:16 GMT

Hi deep_dive,

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

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

deep_dive — Tue, 25 Mar 2025 22:53:35 GMT

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.

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

deep_dive — Tue, 25 Mar 2025 22:49:59 GMT

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?

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

Susheel Nuguru — Tue, 25 Mar 2025 13:55:31 GMT

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.

RE: Feasibility of USB UAC Transmission with nRF52833 and Example Inquiry

Turbo J — Tue, 25 Mar 2025 09:34:59 GMT

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.