On 08/17/2017 07:28 PM, David Jones wrote:

And to think all I did to get my cheap USB sound card to work at 5-10ms latency was install a low-latency kernel (from KXStudio) and change buffer and period settings on QJackCtl's non-Advanced settings tab.

That's on two different systems: one Intel i7, the other an AMD Phenom 2. No tweaking deadline scheduler or scaling governor (for the Intel, Phenom 2 has no such capability).

But I'm using Debian Testing + KXStudio, not ArchLinux or Ubuntu.