SbFFT is a spectral display and filtering program for use in Amateur Radio and audiophile applications. It's features include: * Sound Blaster 16 (or 100% compatible) input and output * Band widths of 2K, 4K, 8K or 16K Hz * Spectral resolutions of 1 Hz to 16 Hz per pixel * Display of power density spectrum with 4 color maps in either linear or logarithmic scale * Define and use up to six filters simultaneously -- band pass, band stop, low pass, and high pass. Filters have 25 Hz skirts at 3 to 50 dB points * Filters are defined by mouse movement * Filters may be as narrow as 1 Hz * Net filter passband is displayed at all times * CDROM and line SB 16 inputs * .wav file inputs and outputs * Filters can be selectively enabled and disabled by a single keystroke or a single mouse click. This allows for quick reconfiguration in case of changing conditions, etc.