Summary

OB-Xd is a software synthesizer emulating the Oberheim OB-X analog synthesizer, preserving its voice architecture, filter characteristics, and envelope behavior while removing the original hardware's limitations. It offers enhanced features such as extended voice stacks and modern tuning, suitable for vintage and modern sound textures.

Features

• Complete rewrite of the engine with the original author, improving efficiency and extendibility.
• Polyphonic unison with up to 16 voices per note and up to 128 voice slots in total.
• High-quality oscillators with reduced aliasing and advanced pulse-width modulation tools.
• Improved analog-modeled filters with authentic resonance, self-oscillation, and warm character.
• Attack envelope shape control for snappy to gentle tones with log-linear adjustment.
• Full MIDI Polyphonic Expression (MPE) support for expressive performance control.
• Bidirectional MIDI with virtual CoreMIDI port for syncing surface controls and external gear.
• Oversampling up to 4x for high-quality sound without excessive CPU use.
• Two independent LFOs with multiple waveforms, tempo sync, and modulation routing.
• Visual feedback on controls via knob LED visualizer and animated ADSR strips.
• Dynamic pan presets and analog mode for detuning and filter wobble effects.
• Preset management with recursive search, import of previous version patches, and flexible MIDI learn interface.
• Available as standalone and various plugin formats including AAX, AU, VST, VST3, and LV2.

Platform Compatibility

Supported on Windows 10+ (with AVX2-capable Intel or AMD CPUs), macOS 10.14+ for Intel and Apple Silicon, Debian 10+ Linux, and iOS 14 or later.

Usage and Licensing

The free trial version is fully functional but restricts commercial use and some features in offline mode. A one-time internet connection is required for license activation; thereafter, offline use is possible.