Support Forums › Forums › FIR Designer M Support › Designing 2-way for miniDSP › Reply To: Designing 2-way for miniDSP
Use the + – buttons to move the delay by 0.25 of a sample.
>> Also I don’t understand why in import tab delay is negative number
The -4.25 samples is on both channels, so their time relationship is retained. Moving both negative in time just gets their phase into a range that is easier to work. (This delay is not important for the miniDSP.)
>> while in gain/polarity/delay tab it is positive number.
The positive sample delay on the gain/polarity/delay tab is delay ONLY on the tweeter. It moves the tweeter phase to better match the woofer phase in frequency region of the crossover filter. This delay is added with the “FIR alignment delay” to give the “Total Processor Delay” — see the system Export tab. The “Total Processor Delay” is the delay that needs to be set on each channel in the miniDSP, to ensure your overall design works. On the example I gave you, channel 1 – the tweeter – needs 7.3958 ms and the woofer 0 ms. But these numbers may be different since you have changes the channels to 96 kHz and likely adjust the FIR filter sizes.