SonicXTC has released Acid Zone Retro, a freeware monophonic single oscillator synthesizer, that is designed to harken back to the DIY analog synths of the past. AZR-01 has all the synthesis programming parameters available on the front panel. It comes with 32 presets to get a user started.
Highlights:
- 64 user presets.
- 32 custom presets.
- MIDI automation.
- Delay and Reverb effects.
Price: Free.