I don't know if it creates an audible change but most optical cable is subject to output level variations with bending. This effect is orders of magnitude greater than with coax cable, even at coax at microwave frequencies. The effect is very dramatic. So I imagine if you were to cause a vibration in the cable at an audio frequency there might be an analog signal introduced into the path. And maybe somehow it would get through the optical to electrical converter and all the various digital circuitry and then to the DAC, where it could introduce noise in the output - maybe.
But then again a coax cable can carry any EMI that is in the digital source or is picked up by the cable. That is something an optical cable won't do. There is optical cable out there that is immune to bending. We are using some it here with our optical to electrical equipment. Maybe these high zoot cable manufacturers ought to use it. Then they could make a claim based on facts, though whether it makes an audible difference or not, who knows. A simple set of electrical measurements could settle this quickly. Jitter can be measured to levels well below the apparent threshold of human detection. We make low cost equipment that measures it to below 10 picoseconds. Unfortunately it is for use only at much higher frequencies. Has anyone seen anything backed up by measurements? -- regalma1 ------------------------------------------------------------------------ regalma1's Profile: http://forums.slimdevices.com/member.php?userid=6658 View this thread: http://forums.slimdevices.com/showthread.php?t=33146 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
