USB Audio Sampling Rates

[Andrew]

What frequencies for USB Audio are supported in the NRF52840?

[Håkon Alseth]

Hi,

 

The USB device (USBD) controller on nRF52840 implements a full speed USB device function that meets 2.0 revision of the USB specification.

This means that USBD peripheral is 2.0 compliant, but has a limitation of 12 MBit PHY (full speed physical layer).

 

The USB audio class for full speed devices supports stereo, up to 48 kHz sampling rate, as described in this article:

https://www.edn.com/design/consumer/4376143/Fundamentals-of-USB-Audio

 

Best regards,

Håkon

 

[Andrew]

Should there be any trouble then in decreasing the frequency?

[Håkon Alseth]

That should be fine, as long as you use the "standardized frequencies", like 16/32/44.1/48.

You can find more info on the USB audio class here: http://www.usb.org/developers/docs/devclass_docs/

 

Cheers,

Håkon