Iowegian's ScopeFIR™ and ScopeDSP™ are affordable, professional-quality software tools for use by DSP professionals, students, and advanced hobbyists.

ScopeFIR is a comprehensive tool for designing, analyzing, and modifying complex Finite Impulse Response (FIR) filters. It uses the Parks-McClellan algorithm and all other major FIR filter design methods.

ScopeFIR News: ScopeFIR Version 4.1.1 was released on April 10, 2007!  See What's New in ScopeFIR for details.

ScopeDSP is a comprehensive tool for analyzing sampled-data signals. It transforms between the time and frequency domains using an efficient Arbitrary-N FFT, and provides many useful plots and statistics for both domains.