Audiophilepure

The phase tells the same story of agreement. It holds at zero through the bass and lower midband, the region where the magnitude is flat, and turns upward only as the roll-off engages through the treble, the two captures advancing along the same trajectory to the edge of the plotted band.

Two points deserve to be drawn out. First, the phase of the 192 kHz and 384 kHz measurements coincides as independent confirmation of the magnitude result: not merely the amplitude but the full audio-band transfer function is the same at both rates. Second, a word of caution about how to read the steep phase rise toward the top of the band. It is tempting to treat that large rotation as the converter’s own behavior, but it is not: where the magnitude is still flat, a well-behaved reconstruction filter contributes almost no phase, so the bulk of what climbs here is the residual time reference of the impulse-response measurement rather than a property of the DAC. The filter’s genuine in-band phase is small, and it tracks the magnitude roll-off as it should.