Utilities

(Updated Oct. 31, 2008)

Four utility programs are available to demonstrate some of the signal generation and processing functions described on the website.

Waveform Explorer

This program allows setting each of 16 partials to construct a complex waveform using the inverse Fourier transform (sum of sine waves). The resulting waveform can be saved to disk as a WAV file and as a graphic (EMF). Settings can be copied to the clipboard.

FM Explorer

This program implements a three oscillator FM synthesizer. Each oscillator is combined with an ADSR envelope generator. Several presets are available as examples. The program can save the sound to a WAV file. The settings can also be copied to the clipboard.

Reverb Explorer

This program implements a Schroeder reverb. The loop times and reverb time can be set from the program to hear how they affect the sound. Sounds can be internally generated or loaded from a WAV file. The processed sound can be saved to disk.

Flanger Explorer

This program implements a Flanger/Chorus effect. The delay times, modulation depth, and amplitudes can be set to hear how they affect the sound. Sounds can be internally generated or loaded from a WAV file. The processed sound can be saved to disk.

An installer module for Microsoft Windows will install all four programs.

Virtual Keyboard

This program displays a piano keyboard on the screen and allows playing instruments with the mouse. Note: you need instrument files to make use of this program Download an example. More will be available here soon.

Download the utilities installer.