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fd_butterworth

fd_butterworth is a 3-pole, 3-zero Butterworth low-pass, high-pass, or shelving filter. Set the low-pass frequency to 0 and normalization to 1 for high-pass operation, or set the high-pass frequency to at least half the sample rate and normalization to 0 for low-pass operation; the patch warns that it may produce loud output.

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  • Download via Deken.

    Open Pd and go to ToolsFind Externals. Search for fd_lib and install it. Then create an object with declare -lib fd_lib -path fd_lib. Finally, use fd_butterworth or any other object from fd_lib.

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