by Pat Brown
Pat Brown have produced some WAV files for various filter types that can be opened in your favorite measurement program so you can study the filter behavior.
A recent long-running thread on the SAC forum discussed the delay characteristics of various filter types. Bill Thrasher wrote an excellent blog on the topic. For those interested in investigating further, I have produced some WAV files for various filter types that can be opened in your favorite measurement program.
The files include:
- 1 kHz Butterworth High-pass (filter orders 1-4)
- 1 kHz Butterworth Low-pass (filter orders 1-4)
- 1 kHz Band-pass (+6 dB, 1-octave)
- 1 kHz Band-pass (-6 dB, 1-octave)
- Dirac Pulse
Study the magnitude, phase response and group delay characteristics in the frequency domain. Study the impulse and log-squared impulse responses in the time domain. Mix them in a wave editor to study their combined response.
The files can be downloaded from the Member Files area of the SynAudCon Website. Please login before using the link. pb