Continuous Fast Fourier Transform

This document provides a program library write-up for the CFFT (Continuous Fast Fourier Transform) software, designated as DECUS No. 12-23. Developed by J. R. Mason at the UCLA Brain Research Institute in 1971, this program is designed for the PDP-12 computer (8K) equipped with a KW12 clock and TU55 LINCtapes. The package consists of multiple programs that handle continuous data sampling (CFFS), spectrum computation (CFFTW), and display. The write-up includes a detailed program description, operational instructions, and flowcharts. It also contains supplementary notes regarding a related program developed by James Bryan for the National Institute of Mental Health.