>> http://synthtech.com/waveedit/ <<WaveEdit: a cross-platform, open source waveform editor
WaveEdit is a free tool on PC/Mac/Linux that allows powerful creation and editing of wavetables for the E352 and E370 VCOs. Using standard WAV formats, the editor includes a full toolbox of shortcuts. An audio Preview is available to audition the waves before loading into the module.
Synthesis Technology WaveEdit & Wavetable VCOs
https://www.youtube.com/watch?v=kZfh5GV4Jfk