Zeeon synth 4+

Analog modeling synthesizer


Designed for iPad

    • 4.8 • 201 Ratings
    • $14.99
    • Offers In-App Purchases



Zeeon is a virtual analog synthesizer, powered by an advanced analog circuit modelling engine. We spent a lot of time analysing iconic analog synths, both vintage and modern, to find out which parts of the circuit contribute most to their specific character. We used this knowledge to create a unique synth, with focus on what’s most important - the pure, organic and detailed sound. Many analog synth emulations sound dull. Not Zeeon. We take care of the entire spectrum range from deep lows to sweet highs. All audio and modulation signals are processed at 176 KHz (4x oversampling).

Full manual and audio demos available at the BeepStreet website.


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

• 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.

• 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!

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

• 144 presets and Tutorials bank.

More presets and exciting features in upcoming updates.

What’s New

Version 1.64

- Improved AUv3 parameter automation handling

Ratings and Reviews

4.8 out of 5
201 Ratings

201 Ratings

elliot_bn ,


This is my first iOS synth and I love it! Designing sounds on it and playing them is so much fun and easy. It’s can be deep but it’s not mind boggling, I know basic synth parameters but I’m not great and thus was easy to pick up and it’s really teaching me a lot and most importantly it sounds fantastic.

After having used it for a little while now I find that I really like just sitting down for 5-10 minutes and programming a patch that I like which often leads me to find a chordal or melodic idea I really like. I could open up GarageBand and start a new project but that sort of kills the fun and spontaneity of quickly making a patch and finding something cool, recording it and getting back to work or whatever I was doing. I think that’s part of what the iPad was made for. I’m trying to find a way to do that, the easiest way I can see is through IAA and something like Audioshare but this synth doesn’t support that. I was hoping that would be possible or if anyone has any suggestion, I could be totally wrong, I’m very new to the iOS music world.

Sorry for the long review, writing this hear because the developer seems like he’s great at responding here. And thank you for such an awesome synth!

Musecrafter1 ,

Amazing flexibility, nicely balanced.

When I first bought this synth it sat in the background largely unused but it has quietly become my go to in a rather large collection of great iOS synths. For me, I find the interface very intuitive so when I’m building new patches I don’t get bogged down in trying to figure out where everything is. The sound quality is excellent but it’s the mod matrix that gives this beast so much power and flexibility! The experimenting seems endless. I have other synth that have incorporated a mod matrix but they are also populated with more features which, to me, slows down the process of creating patches. Zeeon seems to have struck the right balance of features and has been a joy to work with.

If you do not like creating your own sounds, don’t worry. There are a decent amount of presets that sound terrific!

Awesome synth ,

Updated review

Please see update below! I have been using the delightful Sunrizer synth for almost two years now, and was really looking forward to playing with Zeeon...while the sound is quite good, I’m not having luck getting the envelope generators to work properly. If this feature worked, I would find this app very useful, but for my purposes, an envelope generator really needs to work properly. Bummer!

IMPORTANT UPDATE!! I heard back from the developer within hours about my “problem.” It turned out that re-starting the iPad a second time solved it. So very pleased with this app! No complaints at all now.

App Privacy

The developer, BeepStreet, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

More By This Developer

Sunrizer synth
Dagger synth

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