XAOC Devices Bohumin
Stereo AUX-B expander for the Ostrawa mixer
10 HP Eurorack module
Bohumin is a dedicated expander for the Xaoc Devices Ostrawa stereo mixer, adding a second full-stereo auxiliary bus (AUX B). Each of Ostrawa's four channels gains an AUX B send level knob and a bipolar CV input, feeding stereo send outputs and return inputs for an external effect. Two attenuators set the return level of the AUX A and AUX B buses, and four gate inputs provide clickless remote muting of each channel.
Features
- Second full-stereo auxiliary bus (AUX B) for the Ostrawa mixer
- Four per-channel AUX B send level knobs
- Four bipolar CV inputs for voltage control of AUX B send per channel
- Internal VCA on each AUX B send for clean CV modulation
- Stereo AUX B send outputs and stereo return inputs
- Manual stereo return attenuators for both the AUX A and AUX B buses
- Four gate inputs for clickless remote channel muting
- AUX effects run in parallel with the main mix, added rather than replacing the dry signal
- Ostrawa channel buttons stay active alongside gate control
- Powered directly from Ostrawa with no separate bus connection
- 10 HP wide and 31 mm deep, skiff-friendly
- Pairs with a single Ostrawa unit
Controls & Jacks (18)
- AUX Send 1
- AUX Send 2
- AUX Send 3
- AUX Send 4
- AUX Ret A
- AUX Ret B
- Active 2
- Active 3
- Active 4
- Active 1
- AUX B CV 1
- AUX B CV 2
- AUX B CV 3
- AUX B CV 4
- AUX B Send L
- AUX B Send R
- AUX B Return L
- AUX B Return R
How-To Guides
- Stereo reverb on the AUX B bus
- CV-automated effect throws
- Clickless rhythmic muting
- Parallel processing on one channel
- Tame a hot AUX A return
Explore the interactive Bohumin panel on BleepDex — tap any control to learn what it does.
