Ostrawa is a 4-channel voltage-controlled mixer with a full stereo configuration.
Centered around a stereo mixing bus, each channel features one stereo AUX send (switchable pre/post VCA) and a stereo return. It incorporates a click-free mute function, per-channel level meters, and an ultra-low-noise, DC-coupled signal path utilizing high-quality VCA and op-amp ICs.
[直輸入品][Direct Import]
Ostrawa features meticulously designed voltage control response to achieve the ideal feel for a Eurorack mixer. It employs an advanced control circuit combining internal voltage generated by the panel potentiometers with external CV for volume and stereo balance control. This keeps VCA gain within practical ranges while minimizing distortion, delivering natural and easy-to-use attenuator characteristics.
Ostrawa was designed as a sister module to Xaoc Devices' Praga. While sharing similarities in operational response and control layout, it differs in some features due to stereo input capability and panel space constraints. Connecting multiple Ostrawa and Praga units allows for building flexible mixing systems tailored to specific applications.
For detailed specifications and operation, please refer to the manual.
Features
Full stereo configuration
Natural and easy-to-use volume response
Channel level indicators
Stereo AUX send and stereo return
Channel mute without click noise
Expandable with multiple units or optional expanders
Technical Specifications
Euro Rack compliant
Width: 20HP / Depth: 46mm (including ribbon cable and bracket)
Current consumption: +180mA / -150mA
Reverse connection protection circuit included
Expandability
Multiple Ostrawa and Praga units can be cascaded to create a submix configuration.
Using the dedicated Bohumin expander allows adding a second full stereo AUX bus. Voltage control of effect levels per channel; manual attenuators for stereo returns on both AUX buses
Bohumin also features 4 gate inputs for automatic clickless muting of each stereo input channel
Future release of the Ustka passive breakout panel, providing individual VCA outputs, is planned for multitrack recording applications
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