Mikewdc - that harsh sound, often referred to as "hash" is indeed jitter. It's often difficult to pinpoint exactly what is going on or what will fix it, but we all know that it just doesn't sound "right." The human ear is an amazing thing that can adapt to a lot of different sonic qualities (warm vs. cold, refined vs. vivid) and room treatments (a 'live' room with lots of echo vs a 'dead' room with no echo or dynamics) but it has a very hard time with sound that is just plain 'wrong.'
Digital can introduce things like pre-echo (where the echo of a note precedes the note) and unnatural harmonics as it is anyway and jitter makes them stand out even more. As subtle as they might be, these things don't process as natural to the human ear and therefore stand out. It's one of the reasons so many audiophiles prefer vinyl.
What is the fix? Well, for the Sonos, one of the obvious issues was the clock in the device is a consumer level item, and not audiophile quality. Power conditioning and a good power cable helped as well. And a quality digital cable made a difference as well.
And now you know why this is an expensive hobby.
Digital can introduce things like pre-echo (where the echo of a note precedes the note) and unnatural harmonics as it is anyway and jitter makes them stand out even more. As subtle as they might be, these things don't process as natural to the human ear and therefore stand out. It's one of the reasons so many audiophiles prefer vinyl.
What is the fix? Well, for the Sonos, one of the obvious issues was the clock in the device is a consumer level item, and not audiophile quality. Power conditioning and a good power cable helped as well. And a quality digital cable made a difference as well.
And now you know why this is an expensive hobby.