Behringer UB-Xa Manual
PDF manual · 34 Pages
English
Advantages and Disadvantages
Advantages
- 16-voice bi-timbral analog architecture with two oscillators per voice for rich, layered sound.
- Switchable 2-pole/4-pole filters, dual envelopes, PWM, sync and extensive modulation for deep sound design.
- 512 patch memories, 64-step sequencer per patch, unison, split/double modes and versatile arpeggiator.
- Comprehensive performance controls including MPE support, modulation lever, pitchbend and assignable pedals.
- Modulation matrices, Atrophy vintage profiles and firmware updates via SYNTH TRIBE provide customization and longevity.
Disadvantages
- Complex feature set and deep menus present a steep learning curve for beginners.
- Physical controls may not always reflect stored patch values until adjusted (panel-to-memory mismatch).
- Atrophy/vintage options can introduce instability if not managed carefully for live use.
- Split mode halves polyphony per zone (max 8 voices each), limiting dense layered chords in splits.
- Extensive MIDI and global settings require time to configure for multi-device setups.
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Frequently Asked Questions
The UB-Xa is a 16-voice polyphonic analog synthesizer with two analog oscillators per voice. It is bi-timbral, allowing upper and lower zones or double patches; split mode divides voices between zones (max 8 voices per zone).
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Yes. The UB-Xa is USB Class Compliant (no driver required), offers DIN MIDI In/Out/Thru, detailed USB/DIN forwarding options, MPE support and configurable MIDI channels and forwarding for integration with DAWs and external gear.
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Atrophy (Vintage) profiles emulate aged component behavior—filter drift, VCO/VPO errors and randomization—so you can recreate classic unstable vintage character or choose modern, stable presets. Profiles are selectable and editable in the Vintage settings menu.
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Yes. The UB-Xa provides 512 patch memories, preset banks, 35 split and 35 double programs, and stores a 64-step polyphonic sequence per patch. Patches can be written, named (up to 16 characters) and recalled via encoder or assignable preset buttons.
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Performance controls include a separate LFO, modulation lever, pitchbend, transpose and dedicated buttons for upper/lower zones. There are multiple assignable footpedal inputs for sustain, program, hold, vibrato and filter with configurable actions and trimming.
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Firmware updates are available from Behringer and installed via the SYNTHTRIBE app for Windows or macOS using the USB connection. The display shows current firmware versions (Main, Voice, Keys) and updates are recommended to access new features and fixes.
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The UB-Xa uses an auto-sensing switch-mode PSU for 100–240V AC. Use the supplied IEC lead and allow ~15 minutes warm-up for tuning stability. Power the synth before amps/mixers with volume low, and observe safety instructions regarding ventilation and servicing.
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Product Description
Behringer UB-Xa — Classic Analog Polyphonic Power
The Behringer UB-Xa revives the spirit of the 1980s polysynth with modern reliability and deep sound-design flexibility. With 16 voices, two analog oscillators per voice, dual switchable VCF modes (2-pole/4-pole), and a full 61-key poly aftertouch keyboard, the UB-Xa is built for lush pads, thick leads and complex textures. It combines vintage character with contemporary performance features: bi-timbral operation, unison, keyboard split/double, programmable sequencer and an expressive arpeggiator.
Hands-on control is central to the UB-Xa. Dedicated knobs and buttons for oscillators, filter, envelopes, LFOs and modulation routing let you sculpt sound in real time. Two ADSR envelopes and multiple LFO waveforms power nuanced timbral changes, while PWM, oscillator sync and filter envelope modulation add classic analog movement. The instrument includes 512 patch memories plus Split and Double program slots for quick retrieval of complex setups.
Performance features extend its usability on stage and in the studio. The separate performance LFO, modulation lever, pitchbend and assignable footpedal inputs enable expressive playing and dynamic control. MPE support and comprehensive MIDI (USB and DIN) connectivity let the UB-Xa integrate smoothly into modern DAW environments and MPE controllers. The sequencer stores 64-step polyphonic sequences per patch and the arpeggiator offers many playback patterns and gate/tempo options for rhythmic sound design.
The UB-Xa also offers advanced calibration and vintage ‘Atrophy’ profiles that emulate aged circuitry and characterful drift, letting you dial in classic instability or pristine tuning. Global settings, modulation matrices (eight per patch), and extensive shift-functions provide granular control over voice behavior, MIDI routing, pedal assignments and firmware management. Factory defaults, recover last edits, and firmware update paths via Behringer’s SYNTH TRIBE app keep the instrument maintainable and future-proof.
Robust ergonomics and practical design complete the package: warm-up recommendations, IEC power handling for global mains, rear-panel connectivity (USB, MIDI In/Out/Thru), and four assignable preset recall buttons for quick access. Whether you want honest retro tones or complex modern patches, the UB-Xa is a versatile analog polysynth engineered for both studio sound design and live performance.
Notes
- Warm-up the synth ~15 minutes for stable tuning and optimal performance.
- Firmware updates and SYNTHTRIBE app support are available from Behringer.
- Atrophy profiles emulate vintage deterioration — useful for character, optional for stability.
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