rtf_create_bandpass_analytic(3) on Linux
The text c009f85c75a6, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it. The page shows this text now.
Creates an IIR filter estimating the analytic signal in a bandpass.