Quality sound measurement software equivalent to at least US$10,000 hardware. The software license of RAL costs just US$24, but RAL is more functional than the usual FFT analyzer. General realtime measurement function is entirely included.
It has the signal generator, Peak level meter, Power spectrum, 1/3 octave analysis, 3D graph (TEF), and Oscilloscope. It can be used broadly from a home audio, and a car audio to a concert hall.

DSSF3 Light is a highly advanced sound analyzer greatly exceeding the usual FFT analyzer's performance. It is the best choice for learning sound measurement and for education. DSSF3 Light is equipped with the latest functions of the realtime analyzer, such as the signal generator, the FFT analyzer, the sound level meter, the oscilloscope, and the sound recorder.

Various sound measurement can be performed using a various functions in the realtime analyzer. The FFT analyzer with the data record and the export function, the distortion analyzer, and the phase meter enable various measurement.DSSF3 is the world's highest class measurement system equipped with the latest technology. If you try, it will turn out that DSSF3 has many functions and is very easy to use.Please try this great tool .

DPlot is a general purpose graphing program designed for scientists, engineers, and students. It features multiple scaling types, including linear, logarithmic, and probability scales, as well as several special purpose XY graphs and contour plots of 3D data. Data can be input via file, copied from the clipboard, generated by an equation within DPlot, sent to DPlot from Excel via the supplied Add-In, or sent to DPlot via dynamic data exchange.

An affordable audio recording, restoration, and CD burning solution that offers the easiest way to achieve professional results. Use DART XP Pro to record from any audio source, or use on existing audio files to clean up even the most troublesome problems using FFT and AR DeNoise and DeHiss algorithms. It includes a CD burning utility to organize your audio files into custom play lists. Burn standard Audio CDs that can be played in any CD player.

PlotLab is a set of .NET 2.0 components for very easy and fast Data Visualization. The library includes: Scope - scientific chart component for plotting multi-channel data. Waterfall - data plotting component, especially suitable for FFT results. The components allow zooming, navigation, direct printing, clipboard copy, save to file and more. Optimized for very fast data plotting, and support multithreading. Free for non-commercial use.

A Delphi component (and ActiveX) for use in Win32 (9x/ME/2K/XP) software with BASS. It's purpose is to provide the most powerful and efficient, sample displaying functions like displaying the sample in 3D with configurable colors, automatic support for ID3v2 SESC, making a selection, zooming, quick-playing from click, configurable selection playback repeat count, edit and create Subsong seekpoints, etc. all on a powerfull Direct3D display.

Object-oriented graphic dev-tool for digital image processing and Machine Vision . Supports Microsoft and Borland compilers. Generates DLL's out of C++ source. Free C++ source code of many arith. operations, binarization, morphology, filter, FFT, Hough, histo. functions, color conv., measurement functions. For education in schools, universities, application, medicine, image enhancement, etc.

Delphi/C++ Builder VCL components library for very easy and fast Data Visualization. The library includes: Scope - scientific chart component for plotting multi-channel data. Waterfall - data plotting component, especially suitable for FFT results. The components allow zooming, navigation, direct printing, clipboard copy, save to file and more. Optimized for very fast data plotting, and support multithreading.
Free for non-commercial use.

Delphi/C++ Builder VCL components library for fast Digital Signal Processing (DSP) and data visualization. Allows fast complex signal manipulations with zero lines of program code. SignalLab consists of SiganlPlayer, SignalLogger, Signal Generator for Sine, Triangle, Square, DC and Jaehne signals, Noise generators, Scope, Waterfall, LowPass, HiPass, BandPass, BandStop filters, FIR,IIR,FFT,DFT, and more. Free for non-commercial use.

The SignalLab is a set of Visual C++ components for fast Digital Signal Processing (DSP) and data visualization. They allow fast complex signal manipulations with zero lines of program code. SignalLab consists of SiganlPlayer, SignalLogger, Signal Generator for Sine, Triangle, Square, DC and Jaehne signals, Noise generators, Scope, Waterfall, LowPass, HiPass, BandPass, BandStop filters, FIR,IIR,FFT,DFT, and more. Free for non-commercial use.

The SignalLab is a set of .NET 2.0 components for fast Digital Signal Processing (DSP) and data visualization. They allow fast complex signal manipulations with zero lines of program code. SignalLab consists of SiganlPlayer, SignalLogger, Signal Generator for Sine, Triangle, Square, DC and Jaehne signals, Noise generators, Scope, Waterfall, LowPass, HiPass, BandPass, BandStop filters, FIR,IIR,FFT,DFT, and more. Free for non-commercial use.

The OscilloScope + FFT Spectrum Analyzer for real-time investigation of data accepted from sound card or other ADC you will want. Maximum number of channels, sampling frequency, bit rate of data are limited only by type of used ADC. FFT results analysis is realized in real-time mode. Fully functional demo works with ADC of sound card.

PlotLab is a set of Visual C++ components for very easy and fast Data Visualization. The library includes: Scope - scientific chart component for plotting multi-channel data. Waterfall - data plotting component, especially suitable for FFT results. The components allow zooming, navigation, direct printing, clipboard copy, save to file and more. Optimized for very fast data plotting, and support multithreading.
Free for non-commercial use.

The free version of the advanced sound measurement software DSSF3 is now available. It consists of the signal generator, sound recorder and player, and the peak level meter. DSSF3 Basic works with the latest soundboards. Two or more soundboard can be selected easily. The sampling rate can be set up to the maximum value allowed by the hardware.

Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift.