开云体育

Hello Howard,

From our studies we have discovered that there are problems with certain motherboard chipsets relating to the number of USB devices. This manifests itself as an inability to support a large number of audio endpoints, in the instance of our Scottie Globemaster SDR? we require four, two for the Globemaster and two also for the Plantronics headset which we recommend for our product.

Interestingly we have uncovered a similar problem on Linux, so it *may* not be OS related. The USB bus has plenty of bandwidth, it appears to be a limitation in some computer hardware and/or software to manage large numbers of endpoints. Unfortunately the issue is your computer rather than your GUI software or your Softrock hardware.

It may interest you to know that I have more than one PC that cannot satisfy the above requirements. and these are fairly recent machines !

On the Linux front it may interest you that the entire range of RPi products, including the RPi4 have serious USB design issues, they also are unable to handle two full duplex USB devices!

That is why we do not use the Raspberry Pi range !

On the other hand the Odroid N2 SBC has a correctly designed USB system, one that works as you would expect. With the Odroid, you just select your group of sound devices and you are there. How good is that !!!!

I hope the above helps to steer you in the right direction.

Regards

Ed GM3SBC