Tony - the difference between your two seems just to be low-frequency (<10Hz) noise. The current ImpulsePrep procedure doesn't filter out noise much below the sweep-start frequency, so that dominates (-40dB) versus the HF noise over long time intervals.
Most of the interesting action in the impulse response is within the first 10 or 20 milliseconds... Some similar charts of my own setup: with a bit of extra LF filtering http://inguzaudio.com/img/uncorrected_impulseenvelope.jpg and various other charts incl the DRC/Octave output (but no narrative yet): http://inguzaudio.com/img/ -- inguz ------------------------------------------------------------------------ inguz's Profile: http://forums.slimdevices.com/member.php?userid=1139 View this thread: http://forums.slimdevices.com/showthread.php?t=35615 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
