.name GFFT .type Sound Analysis .short FFT spectrum analysis of sample files .description Update to GFFT Version 1.12. GFFT is an FFT-based spectrum analysis program with many features. By operating from stored sample data files, it offers higher resolution and/or accuracy than real-time analyzers. It accepts 8, 12, or 16-bit data in in IFF 8SVX, AIFF, and AVR formats, or in unformatted files, and can accept data points entered through a console in floating point.\n GFFT can be operated from either a Workbench GUI or from a CLI in interactive or batch modes. It has built-in help facilities for all operating modes with a 170+ Kb help file.\n GFFT can produce high quality spectrum plots on screen, plotter, or printer, or save to Postscript or TeX files, or output spectral data in text form to a console or file. (GNUPLOT, a separate program by other authors, is required for plotting features. GFFT is designed to invoke and control GNUPLOT automatically.) It can plot in 2D (Amplitude vs Frequency), or 3D (Amplitude vs Frequency vs Time). It allows the selection of logarithmic X and/or Y axes, the dB scaling of X, and arbitrary 3D rotation. GFFT can show multiple spectra in the same plot, or append spectral data bands from earlier sessions.\n GFFT provides 8 selectable FFT window types, including Blackman-Harris 92 dB. It can apply a special weighting for pink noise testing. Smoothing, calibration, ranging, and quantization are also available. There are no arbitrary limits to the number of frequency bins or smoothing points, or to the length of data which can be analyzed. .version 2.03 .date 1996.1.2 .author Charles P. Peterson .restrictions NONE .requirements WB1.3 (V34) or higher and 1.5M total RAM, harddrive or two floppy drives. Recommended: WB2.0 (V37) or higher, 3M or more RAM, 3M harddrive space. AmigaGuide or MultiView. Display or WDisplay. .distribution GNU Public License .address 4007 Enchanted Sun San Antonio, TX 78244-1254 USA .email Charles_P_Peterson@fcircus.sat.tx.us cpp@crl.com charlesp@darwin.sfbr.org .exectype 68000 .source All SAS/C source included. .construction SAS/C 6.51 with full optimization using ffp (68000 compatible fast f.p.) .tested A3000 (8M, WB2.1) .run GFFT=WB,GFFT GFFT=CLI,GFFT WORKBENCH GFFT=CLI,GFFT CLI .docs README INSTALLATION INSTALLATION-PROBLEMS GFFT.HELP Bugs SpectrumAnalysis.guide .described-by Charles P. Peterson (Charles_P_Peterson@fcircus.sat.tx.us)