XAOC DevicesKatowice Stereo Variable-Band Isolator
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XAOC Devices Katowice
Katowice from XAOC Devices is a stereo band isolator that isolates and manipulates a selected range of frequencies. It splits incoming stereo signals into low, mid, and high bands. The knobs and associated CV inputs define the frequency and width of the center frequencies. This ranges from 160Hz to up to 10kHz with a width of one to ten octaves.
The low and high frequencies are always automatically adjusted, so the sum of all three signals is equal to the incoming audio. Each band passes into a high-quality VCA with control over the signal's amplitude using the slider and CV inputs. The output of each band and the sum of all three bands post VCA are available as stereo pairs. The first of XAOC's line of stereo devices, Katowice is useful as a band-limiting EQ, crossover network, or DJ-style kill filter under voltage control that fits many niches.
Katowice Features
- Stereo variable three-band isolator
- Splits incoming audio into three bands
- Mid-range is defined between 160Hz–10kHz with a range of one to ten octaves
- High and low bands are automatically adjusted proportionally to the mid-band
- 24dB/oct slopes
- VCA per band
- CV over mid-band frequency and width
- Stereo outputs for low, mid, high, and summed signal
- Eurorack module
- Width: 10hp
- Depth: TBD
- Current draw: 100mA @ +12V, 100mA @ -12V
For our effects, we turned to the Data Bender by Qu-Bit Electronix for glitchy, digital artifacts, the expansive Milky Way from Endorphines for general purpose effects like delays and reverbs, and the crushing Guillotine distortion from Ritual Electronics. We’ve also got a Bastl Cinnamon for filtering and additional drive, and the Katowice by XAOC Devices supplies crossover filtering and multi band isolation for situations where surgical sound shaping is needed. External sounds enter the system through a pair of Mutable Instruments Ears modules, but we can also take advantage of their built-in contact mics for generating and processing sounds fully within the system itself.
The Harlequin’s Context is a preset programmer for generating linked sets of control voltage sources. Each of the four channels can be set up as an LFO, envelope generator, and more, and the configurations of all four are stored together in scenes, which can be accessed manually with buttons on the front panel or sequenced and scanned through for ever-changing modulation in your patches. When paired with a traditional modulator like ALM’s Pip Slope, any system (especially one loaded up with all kinds of effects like this one) can come alive in compelling ways.