RE: NRF52840 Pro Audio

cyberluke — Mon, 04 Feb 2019 13:24:41 GMT

Thank you. Sounds good. I was looking for ESB example. I've seen you did some proprietary demo with guitar mono jack and proprietary low latency mono audio transmission. I think ESB is it. I will test it with stereo.

So for DIY hacker solution, if I need more channels. I could simply use more NRF52 boards on different channels using enhanced shock burst, assuming there is some channel property or autoselect (Yes I see rfChannel in documentation, nice).

The missing part would be to verify USB Audio Class transfer speed & latency. If I would use 2 or 4 NRF52 in parallel, I would need to use some USB hub. Then connect this hub to PC and create Windows driver to read from 2 or 4 usb sound cards, stereo pair each.

As you probably do not implement asynchronous usb audio transfer, the solution would be to use Asio4All WDM driver: http://www.asio4all.org/

This solution could be used in wireless multichannel mixers, wireless synths and any other multichannel audio application. I'm just a hobbyist, but maybe someone would invest in me :-)

RE: NRF52840 Pro Audio

Sigurd — Mon, 04 Feb 2019 12:03:14 GMT

Hi,

1) No, we don’t have any reference design for this. The only example implementing wireless audio on the nRF52 series (from Nordic at least) is the nRFready Smart Remote 3 reference design and Thingy:52, but this is voice quality audio only using HID over GATT( for voice recognition purposes). If you were to use a proprietary radio protocol for low latency audio, I would recommend looking into ESB.

2) Yes, that should be possible. The USB Audio Class Example might be interesting to take a look at.

3) 2 channels should be possible.