I don't know, guys. I have no vested interest in neither answer, but reducing jitter at the source makes sense to me. The way Cees answered the question seems he might be referring to no device needed to lower the jitter introduced by the Octave, why is very low indeed. But I believe the issue at hand is jitter included in the signal supplied to the Octave. Another designer, Steve Nugent from Empirical Audio, is constantly saying he believes reducing jitter at the source (before the DAC) is the single most valuable thing in digital audio - I know, he sells a USB to SPDIF converter, but he also sells asynch USB DAC.
When several users consistently report improvements using USB-to-SPDIF converters, and the better regarded converters consistently outperform the lesser converter+Octave combos...I tend to believe there is something to it.
As far as the Touch (the original subject of the thread) + Octave, in a couple of months I expect to start reading reports about Empirical Audio's yet-to-launch Synchro Mesh placed in between, which is exactly aiming the jitter at the source issue. We'll see what users have to say!
Such interesting times in digital audio! Enjoy!