Preset search: Recursive search across all disk preset folders with duplicate handling — same-named presets show as "(1)", "(2)", etc. Step through results in order.

SIMD audio engine: Rewritten in SIMD (AVX2 on Intel, NEON on ARM): 4-8 voices process per CPU cycle instead of one at a time, so you can run thicker patches at lower CPU. SIMD path is auto-selected at runtime.

Bi-directional MIDI: MIDI Out sends CC mirroring on channel 1 (or a selected channel). Pair it with the TouchOSC template or the SFC-OB hardware controller and the surface stays in sync with the plugin.

Polyphonic Unison: Unison stacks up to 16 voices per note, separately from the polyphony count. Polyphony Voices sets how many notes you can hold; Unison Voices sets how thick each one is.

Polyphony 4 with 4 stacked voices each = chord-pads with serious weight. Polyphony 1 = classic mono unison leads. Set Spread above 50% so the stacked voices actually read as separate.

Oscillators: Sample-level anti-aliasing on waveform discontinuities. Oversampling becomes optional rather than required, so CPU stays low at default sample rates without aliasing on the saw and pulse.

Adds three pulse-width modulation controls:

• PW Offset: unipolar offset from the PW knob, applied to oscillator 2.
• PW Env: routes the filter envelope to oscillator 2's pulse width.
• PW Env Both (1+2): applies that envelope routing to both oscillators.

Filter: 4-pole ladder topology with vectorized processing and tuned damping. Layout is cache-friendly for SIMD throughput; the analog character is unchanged.

• Self-Oscillation: 12 dB filter self-oscillates at high resonance.
• FLT COMP: cutoff scaling knob in the Voices section.
• Filter Envelope Shape: blends exponential to linear on the attack.
• Filter Envelope Inversion: inverts the filter envelope output.
• Filter Keytracking: dedicated knob for keyboard-to-cutoff response.
• Level Difference: keeps output level consistent across filter changes.

Attack envelope shape: A logarithmic-to-linear attack slider, independently set for the filter and loudness envelopes.

Hardware-modeled curves: models the capacitor-resistor charging behavior of the OB-X / OB-Xa, instead of the mechanical linear ramp digital synths default to.

Shape control: gentle for pads, mid for the classic OB-X punch, aggressive for plucks and percussive leads.

Analog Mode: per-voice component tolerances. Adds the slight detuning and filter variation that vintage hardware had — set per bank, so different presets can use different amounts.

Oversampling and other features: Oversampling: 1x / 2x / 4x in the registered version.

Preset import: reads OB-Xd 2.x presets and presets from community forks directly.

LFO sync: internal LFO locks to host BPM.

OB-Xd 2.x builds remain available for projects locked to the older version, with no commercial restrictions and the full set of formats (AAX/AU/VST2/VST3/Standalone).