Ckoffend - I would say that most, if not all, digital cables have particular targeted characteristic impedance - in case of audio 75 ohm for unbalanced and 110 ohm for balanced. But just look at typical 75 ohm video coax - it is so much different than analog cable. First of all analog cable uses separate wire for the ground. Carrying ground thru shield is really bad idea and grounding shield at both ends is even worse (XLR is but it was mistake). Metal is important only on the surface (plated) because of the skin depth at these frequencies. Lower dielectric constant is important but not as much as in analog cables. Dielectric constant of polyethylene, most likely used in digital cable is 3.3 while foamed teflon is getting close to 1.5 (and oversized air tubes can bring it even bit closer to 1)).
I understand the need for exploration and experimentation but when I buy cooking oil I am not tempted to try motor oil instead just because there is zero cholesterol and no saturated fat in it(and no other parameters to differentiate them). It was designed for the car and I have no reason to question it. It is a matter of taste, so to speak, but we can get easily lost here since changes between cables are very small. Going by the book shields us from many mistakes.
Jitter will transfer from time domain as a noise. It won't change the sound other than making background less black. That was what I noticed with jitter rejecting Benchmark. Its jitter bandwith is in order of few Hz and at frequncies of interest (kHz) gives -100dB rejection of the noise that was at -80dB to start with - practically complete rejection. Cables here don't make any difference - similar with your Purcell but if you have instead of upsampling DAC oversampling DAC or even NOS DAC than digital cable will make huge difference.
There is an excellent article in Stereophile (available on line) on the jitter explaining how sidebands are created, why they are audible and showing everything in numbers with typical transport/CD. Just educational - you can use any cable with Purcell (if I understand it right)
I understand the need for exploration and experimentation but when I buy cooking oil I am not tempted to try motor oil instead just because there is zero cholesterol and no saturated fat in it(and no other parameters to differentiate them). It was designed for the car and I have no reason to question it. It is a matter of taste, so to speak, but we can get easily lost here since changes between cables are very small. Going by the book shields us from many mistakes.
Jitter will transfer from time domain as a noise. It won't change the sound other than making background less black. That was what I noticed with jitter rejecting Benchmark. Its jitter bandwith is in order of few Hz and at frequncies of interest (kHz) gives -100dB rejection of the noise that was at -80dB to start with - practically complete rejection. Cables here don't make any difference - similar with your Purcell but if you have instead of upsampling DAC oversampling DAC or even NOS DAC than digital cable will make huge difference.
There is an excellent article in Stereophile (available on line) on the jitter explaining how sidebands are created, why they are audible and showing everything in numbers with typical transport/CD. Just educational - you can use any cable with Purcell (if I understand it right)