Zeeon synth1.67

Zeeon is a virtual-analog synthesizer built on a deeply detailed circuit-modeling engine.
We’ve studied classic and modern analog synths to uncover what gives them their unmistakable character and recreated that essence with precision. The result is a unique instrument that delivers the warmth, movement, and organic depth of true hardware.
While many emulations sound flat, Zeeon breathes. Every note is alive, with tight lows and shimmering highs. All audio and modulation are processed at 176 kHz (4x oversampling) for uncompromised quality across the entire spectrum.

“Desktop-class sound engine ... fidelity of this analog emulation goes beyond everything else on iOS.” - App Store review

Features

. Audio Unit v3 and standalone application with a simple polyphonic step sequencer

. Powerful modulation matrix offering self-modulation and cross-layer modulation, 8 modulation slots, 17 signal sources and 41 targets available, both from modulation modules and audio signal path. This takes Zeeon into semi-modular territory. Imagine oscillator waveform, panning, filter cutoff, resonance or LP-HP mode modulated by oscillators or another layer!

. 2 oscillators with continuously variable waveforms, hard-sync and sub-oscillator. Carefully simulated analog drift and PSU influence.

. Filter: 3 models available: Transistor ladder low pass, OTA cascade low pass and State Variable Filter with continuously variable LP-HP + BP mode.

. 2 low frequency oscillators and envelope generators per voice.

. Overdrive: diode clipper, transistor saturation, wave folder, pre and post filter.

. Up to 2 layers per voice. Layers can modulate each other.

. Effects unit: Circuit modelled BBD chorus, bass booster, zero-delay Phaser, Stereo delay and Reverb.

. 280 presets and Tutorials bank. 3 additional banks available as IAPs.

Full manual and audio demos available at the BeepStreet website.

Version History - Added global tuning settings.
- Fixed a crash when using the standalone sequencer. 1.67 Jun 1 - Added: Project Synthur bank (free) with 144 presets.
- The preset browser displays only tagged presets when tags are enabled. 1.66 11/07/2025 - Fixed: Stability issues in some DAWs. 1.65 09/17/2025 - Improved AUv3 parameter automation handling 1.64 05/18/2023 - Fixed: crash when host buffer size is bigger than 1024 samples.
- User interface scales to any window. 1.63 05/16/2023 - Fixed: layout issues on iPhone 1.62 02/28/2023 Fixed: problems with importing preset banks 1.61 02/16/2023 - Fixed: tapping Tools button several times caused crash 1.60 12/08/2022 - Fixed: Audio Unit validation failed on Apple Silicon Macs 1.55 06/02/2022 - Added work-around for an issue with AudioUnit state loading on iOS14 1.54 09/25/2020 Fixed: synth interface not showing in stand-alone mode 1.52 04/03/2018 Fixed crash issue on iOS 11.3 1.51 04/02/2018 • BB Synthwave bank available as IAP
• Added Drift option to Delay effect
• Delay length knob works smoothly without crackles
• Improved parameters automation
• Breathe controller range extended (x2) 1.50 03/04/2018 • Redesigned Drive module. Added high-quality wavefolders. 8 distortion types are available now.
• Precise knobs control (left/right movement)
• Drive parameter is smoothed now
• Fixed issues with Cubasis 2.3 (newest update) 1.40 11/30/2017 • Fixed bug that caused silence when AMP was modulated
• Tools: "Swap layers" works as it should
• MIDI settings are saved in standalone app
• Support for CC02 (breath controller)
• Aftertouch modulation source is smoothed 1.35 11/17/2017 - Zeeon synth is universal now (iPad + iPhone)
- Added a dedicated MIDI input port
- Additional banks are available as IAP
- Stability improvements and bug fixes 1.3 11/10/2017 - Configurable MIDI channel
- New distortion model
- New modulation source in the matrix: self audio input
- Stability improvements and bug fixes 1.2 09/30/2017 - Envelopes can be retriggered in legato playing style: added "Legato trig" button.
- MIDI learn
- MIDI settings
- Support for MIDI program change messages
- Scrollable and resizable piano keyboard
- Knobs react on horizontal movements
- Easier bank import: znb file is associated with Zeeon app
- Sequencer accepts external MIDI events
- Bug fixes 1.1 09/20/2017 1.0 08/30/2017