Design of Bandpass and Bandstop Filters with Implementation Details

The Butterworth filter package contains the following components for bandpass and bandstop filter design: - bendpass.m: A MATLAB implementation of bandpass filtering using Butterworth design, typically involving frequency domain transformation and cutoff frequency specifications - bendblock.m: A bandstop filter program employing Butterworth response characteristics, implementing notch filtering through pole-zero placement - SE144.wav: The original audio sample file for processing. Place this file in the C: drive root directory for proper path reference - bendpass.wav: The output audio file after bandpass filtering, automatically saved to C:\ directory. This file demonstrates frequency-selective amplification within specified passband ranges - bendblock.wav: The resulting audio after bandstop filtration, stored at C:\, showing attenuated frequencies in the designated stopband region The filter design process utilizes the Butterworth filter package's programs and audio files. By placing all files in the C: root directory and executing the bandpass (bendpass.m) and bandstop (bendblock.m) programs sequentially, the system performs spectral modification through digital filter algorithms. The processed audio files are automatically saved to the C: directory as bendpass.wav and bendblock.wav respectively. These outputs provide practical demonstrations of frequency-domain manipulation, showcasing how bandpass filters preserve mid-frequency components while bandstop filters attenuate specific frequency ranges using Butterworth's flat passband response characteristics.