On the 'Free software and teaching aids' page of dspguide.com, identify and describe the two main downloadable program files. For each, state its name, what it contains or does, and list any associated test data files. Summarize this information concisely.
Navigate to the 'Free software and teaching aids' page. Locate 'PROGRAMS.TXT' and extract its description. Locate 'FFT.EXE' and extract its description. Identify and list the names of all test data files associated with 'FFT.EXE'. Synthesize the collected information into a concise answer.
Successfully navigate to the 'Free software and teaching aids' page (http://www.dspguide.com/download.htm). Accurately describe 'PROGRAMS.TXT' as an ASCII file containing all programs from 'The Scientist and Engineer's Guide to Digital Signal Processing'. Accurately describe 'FFT.EXE' as a Fast Fourier Transform program that calculates forward and inverse transforms. List all associated test data files for 'FFT.EXE': FR.DAT, FI.DAT, TR.DAT, and TI.DAT. Provide a concise summary of the findings.