Some calculation:
Frequency resolution = Sampling/Taps
Available min. frequency ≈ Frequency resolution*3
Means when use adjust audio signal with 48kHz, 1024 taps, FIR filters will take effect in frequency above
141Hz of audio signal. The taps value more high, the FIR filter curve more steep.
FIR filter processing audio signal will produce a certain delay:
Delay = (1/Sampling Hz)*Taps/2
Taps
Sampling
256
512
768
1024
2048
Applications:
Linear of the phase curve of the speaker;
48kHz
2.67ms, LF 563Hz
5.33ms, LF 279Hz
7.99ms, LF 188Hz
10.67ms, LF 141Hz
21.33ms, LF 70Hz
96kHz
1.33ms, LF 1125Hz
2.67ms, LF 558Hz
4.00ms, LF 375Hz
5.33ms, LF 281Hz
10.67ms, LF 141Hz
22