Most of the jitter reduction products are using 90's digital technology and are a bit long in the tooth for use with data extracted CD's ... "computer audio". I have owned or tried just about every one of these products that have come down the pipe, and IMNSHO, they are mere toys when compared to the latest development from Empirical Audio called the Pace Car.
I have been using a Pace Car for about 1 year now, it is set up for Airport Express and Apple TV. (See Empirical Audio's website for details). The sound is nothing short of astonishing, right up there with my Reel to Reel and Analog Rig! With the use of Computer Audio & Pace Car, CD spinners are now left in the dust!!! (My $5K transport is now relegated to ballast duty on my rack).
This is ironic, because up until a year ago when the Pace Car arrived, I was of the strong opinion that my highly modified transport and DAC was superior to any flavor of the "computer audio" digital solutions. While I have softened my stance in light of a few recent USB devices that sound quite excellent. IMHO my Pace Car & DAC deliver more resolution to my ear/brain interface than even the latest greatest USB Dac's.
For more "digital" perspective, I am also of the opinion that you rip and playback digital music files in their native language. If they are recorded at 44/16, leave them alone, rip the file and play it back at 44/16. In other words don't use any sort of lossless ripping or upsampling of the files on playback. The less you mess with the data
the better it sounds!
Take from this what you will but "perfect sound forever" has finally arrived ... that is once you properly dispose of "the plastic" from your CD's!!!!!