Behringer 921A Oscillator Driver

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Behringer 921A Oscillator Driver

Behringer

921A Oscillator Driver

4.5 Expert Rating

Product Info

Article Number: 489402
Model: 921A Oscillator Driver
Price: $42.90

* Prices may vary. Check retailer for current pricing and availability.

The 921A is a clever piece for anyone diving into serious oscillator patching. It's essentially a central command hub for a swarm of 921Bs, allowing for complex, evolving textures and sequences. Great for experimental sound design and those wanting to explore the depths of analog synthesis without a massive investment.

Product Description

  • Behringer 921A Oscillator Driver
  • Eurorack Module
  • Authentic reproduction of the circuits from the series "Modular 55 & 35"
  • Controls up to 12 parallel 921B oscillator modules
  • 2 Summed CV inputs for frequency control and 2 summed CV inputs for pulse width modulation
  • Switchable semitone / octave selector and manual pulse width control
  • Power requirement: 15 mA +12 V
  • 15 mA -12 V
  • Width: 8 HP
PROS
  • • Centralizes control of multiple 921B oscillators for complex sounds
  • • Precise semitone/octave switching ensures accurate tuning
  • • Summed CV inputs offer flexible modulation routing options
  • • Affordable price point expands modular possibilities for budget-conscious users
CONS
  • • Requires multiple 921B oscillators for full functionality; a driver alone is limited
  • • 8HP footprint can be restrictive in smaller Eurorack cases
  • • Build quality, while acceptable, isn’t quite as robust as higher-end modules

Product Video

Key Features

Type Eurorack Oscillator Driver Module
Functions Controls up to 12 921B oscillators, CV input for frequency, CV input for PWM, semitone/octave switching, manual PWM control
HP Width 8
Depth Standard Eurorack Depth
Power Draw 30mA +12V, 30mA -12V
Connections 12 x 921B connections, 2 x summed CV inputs, Power connector

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Frequently Asked Questions

No, the 921A is specifically designed to control 921B oscillators; it won't function with other oscillator types.
It allows you to combine multiple CV signals to control either the oscillator frequency or pulse width, giving you more nuanced and complex modulation.
The manual PWM control is reasonably responsive, but it's a potentiometer – expect some slight imprecision compared to dedicated encoders.

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