Odo Synths has released Six, a simple but powerful 6-operator FM synth with 32 DX7 algorithms and 16 4-operator algorithms.

Features:

• 6-operator FM synth with 32 DX7 algorithms and 16 4-operator algorithms.
• Every Operator has a fine tune and octave from -6 to 3. Also pulse width.
• The fine tune can be reset on every operator or for all the operators.
• 5 different waveforms saw / triangle / pulse / sine / ramp.
• 8 stage envelope with 4 different curves with an extra time and level.
• The filter has the same envelope as the operators with 7 different filter types: db12 lowpass / db24 lowpass / 36db lowpass / hipass / bandpass / 4 pole moog filter and a 8 pole moog filter.
• 3 effects on board: chorus / phaser and a stereo delay with a crosser.
• Powerful random option to create your own presets very fast.
• Extra phase modulation and feedback controls.
• 128 presets.

Six, a VST instrument for Windows, is donationware; you have to donate to get the full working plugin. Anyone who donated more than €10 for Unknown 64 Pro will receive a free full working version.