-It is very easy to verify bit-perfect output from SB2 either by playing non-PCM material or by recording with a PC.-
The only problem with this (from the perspective of audible differences) is that the bit perfect test is in the digital domain, where jitter is almost irrelevant unless gross enough to exceed the SPDIF receiver's jitter limits. The conversion to analogue is where the problem arises. If for any reason the jitter spectra changes on the SPDIF, between wireless and wired operation, even if 'bit perfect', there will most likely be audible differences. I'm not saying either party is right here, since I've not yet tried it, but it's easy to think that just because it's bit perfect in the digital domain, it remains so when converted to analogue, which isn't true. Jitter only matters at the point of domain conversion, from A-D, or D-A, whereupon its effects are totally dominated by the digital receiver's jitter transfer function. Most SPDIF receivers use a single PLL, with a corner >5k, so any jitter below that remains unattenuated. To measure the effects of jitter (on the analogue output) is quite hard to do, yet the effects are clearly audible. Andy. -- Andrew L. Weekes _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles