LogSynth
Virtual Analog Synth & AUv3
$14.99 · Designed for iPad. Not verified for macOS.
A polyphonic virtual-analog synth with a physically modeled diode drive filter, 41 hand-tuned presets, and a full AUv3 plugin for the host of your choice.
Logsynth is a polyphonic virtual-analog synthesizer built for people who care what's actually happening in the signal path, not just what the preset browser looks like.
Every voice runs five anti-aliased oscillators (sine, triangle, saw, pulse with PWM, and a band-limited impulse train) plus a dedicated sub-oscillator and noise source, mixed per-voice with independent amp envelopes. Hard sync, FM, and a zero-delay-feedback state-variable filter — switchable low/high/bandpass, 12 or 24 dB/octave — give you real analog-style shaping.
The filter's drive stage is powered by a physically modeled diode circuit, numerically integrated rather than a lookup-table approximation, so pushing it into saturation behaves the way an actual analog drive would.
FEATURES
- 8-voice polyphony, 5 oscillators + sub + noise per voice
- Zero-delay-feedback state-variable filter with resonant feedback and diode drive saturation
- 5 independent oscillator envelopes plus a dedicated filter envelope
- 2 assignable LFOs and an 8-slot modulation matrix
- Built-in chorus, delay, FDN reverb, and 4-mode distortion
- 41 factory presets across Bass, Lead, Pluck, and Effects
- One-tap patch randomizer with adjustable intensity
- Real-time oscilloscope, on-screen keyboard, and CoreMIDI input
- Runs standalone or as an AUv3 instrument inside AU hosts
Whether you're sound designing from scratch or dropping it into a DAW as a plugin, Logsynth gives you the same engine everywhere — no watered-down mobile version, no feature gating between standalone and plugin modes.
Ratings & Reviews
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The developer, SEAN IAN HALENWOOD, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SEAN IAN HALENWOOD
- Size
- 12.2 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Sean Halenwood 2026
