at the risk of being flamed ;-) I fail to see the validity of this testing in a true hifi context.
The device you are testing is re-digitised with an ADC. then you compare the output digital data using the application. Well the ADC has its own transfer function. It's probably a DAC and comparator ADC internally. This means it has to have its own filters for anti-aliasing etc. If the transfer function of the ADC is not highly transparent related to the signals you are comparing, it itself will filter and mask variations, I expect particularly in the high frequency domain phase and transient performance. Basically you can't see differences that the ADC can't code, due to noise floor, aliasing filters and actual bit resolution. It's like using a 1MHz scope to look at 100kHz square wave edges (albeit an extreme case). So don't throw your special bits out yet, they may make the difference in parts you can't measure with the system, but can perceive. Dave -- DaveWr ------------------------------------------------------------------------ DaveWr's Profile: http://forums.slimdevices.com/member.php?userid=9331 View this thread: http://forums.slimdevices.com/showthread.php?t=56591 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
