Support Forums › Forums › FIR Creator Support › Is it possible to create an arbitrary phase flat magnitude FIR filter? › Reply To: Is it possible to create an arbitrary phase flat magnitude FIR filter?
On the “Import” tab, uncheck “Normalise magnitude.” This will bring the HF back up to 0 dB.
(Notice that the “Magnitude offset (dB)” setting is showing that -2.0 dB is being applied by the “Normalise magnitude” process.)
BTW it looks like the sample rate used to make the filter is different to the sample rate of the app when loading the filter. Note how the phase peak is just below 200 Hz in the upper plot and just below 100 Hz in the lower plot.