I'd go further and say this program is of extremely limited practical usefulness, at least with external recordings (ie not made by itself). And I'll only give it that qualification rather than a full NFG because I haven't tried that.
I recorded the output of the SqueezeBox 1 for 30s using Sound devices 702, then pressed red power off button and then play and play again to start track again. All the while recording the analogue out. Split resulting recording into first section and the second - no questions, no pack drill, these *are* the same thing. Stick this into audiodiffmaker. Result, perfectly audible if bassy track, a short-lived null at about 18s followed by perfectly audible track. Okay, perhaps Sound Devices clock is not stable enough. If that isn't, you average sound card isn't either... So I record simultaneously L of SB1 with the left of the same box but through the Arcam Black Box external DAC. One wired to the L channel of the SD702 and the other to the R channel. Now the clock must be synchronous either side, subject to the small latency spread (about 14 samples @ 44k1). Neither piece of kit is modded in any way. Resultant diff signal is about 30dB down with bass peaking at -15dB. Even I don't expect there to be so much difference between the two. I check for channels switched by repeating with the channels switched - this time diff signal sounds like classic stereo differencing and residual averages higher. OK so I probably got the channels right. For a final sanity check I take a phono y splitter and feed the same signal to both L and R of the recorder, via the selfsame cables. Now we're talking - residual down to -90, some peaking on LF to about -80. So at least satisfactory operation can be achieved if the recordings are not separated in time greatly So the Audio Critic guy is probably wrong in this case. Writing off the time-separated recordings as beyond the capability of the program, the simultaneous recording of the Squeezebox1 LH and the same feeding the Arcam BB1 LH show a difference. Audiodifference as recommended by Audio Critic to prove the converse indicates there is a significant difference at about -30dBFS. As a final sanity check I sent a 440Hz + 1kHz signal peaking at -3dBFS through both bits of kit to see if there was significant clipping or anything else obviously wrong, and both came through OK, though the spectrum of residual spurs were different. -- ermine ------------------------------------------------------------------------ ermine's Profile: http://forums.slimdevices.com/member.php?userid=12613 View this thread: http://forums.slimdevices.com/showthread.php?t=37352 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
