It does say that, you're right, but it isn't what happens for me. I've never seen an M-Track Quad ASIO Driver although they describe one. The only reason I knew Asio4all existed was because they suggested using it.
The manual for my M-Track says, 'We recommend the free ASIO4ALL (Audio Stream Input/Output) driver for Windows.'
It's disconcerting that I have to do a dance in the Asio panel every time I use Sonar but the actual performance is now much better for having tinkered with the settings. I'm tempted by the Roland, Steinberg, Tascam, Focusrite alternatives. If it gets unstable or out of hand I'll pick one straight away. I've been looking at them on Amazon.
I was going to reinstall Windows 10 to see if I could clear the problem but that seemed harder than I expected. I started up with a USB to bring up the installation just fine but then I got some messages about how none of the drives were allowed. Something about OEM and GPT. No idea what the second one is or how to continue so I gave up on that. I would have liked to have tried it. I have a solid, tested Acronis backup of my current system so it isn't risky. It just wouldn't let me proceed. I expect if I read up on it via Google I'll see how to sort it out.
It's like trying to clean up a tiny paint drip and knocking the whole can over. You'd think that reinstalling Windows 10 - though a bit drastic and time-consuming - would, at least, be uneventful and simple. I bet it would work, though, as this is a very recent problem and the Asio4all drivers were doing a fine job for over a year. The M-Audio box looks nice and works for general sound: movies, YouTube, etc, perfectly. I'd be more than happy with it if Sonar came on with sound. My restore points don't go back far enough to help. Having cleaned installed Sonar/deleting .ini files, going through the registry and deleting references to ASIO and Cakewalk I felt sure this would go away.
What's annoying is that Sonar will work once I've changed an Asio setting and then changed it back again. As long as I do that it's all good. When I started this thread I didn't imagine it could be persuaded to run reliably but the workaround never misses. I'd have to say things aren't all bad. 'Worse things happen at sea!' as my mum said long ago, the night I got acute appendicitis.
As ever, thanks for giving my Sonar/Asio dilemma some thought and for all your sensible views and suggestions.
Is there a generic Asio driver anyone would recommend? That could be a simple fix, couldn't it?
Steve