User manual
patch  
ideas
7
times.  If  the  shift  is  slight,  a  comb  response 
is  created  resembling  a  very  deep,  resonant 
spectacular barber-pole effect.  Koszalin  offers 
two controls  of this behavior  through  its  re-
gen and density knobs and CV inputs.
   
are available via the regen switch. The left 
and  middle  positions  select  feedback  creat-
ed  from the  downshifted and  upshifted  ste-
reo pair of outputs, respectively. Finally, the 
rightmost  position  selects  combi  with  the 
left  channel  from  the  down  shifted  out  
and  the  right  channel  from  the  up  shift-
ed  out.  The  combined  feedback  position is 
useful when patching both stereo channels in 
SOUND QUALITY CONSIDERATIONS
Koszalin  is  designed  to  operate  on  audio  sig-
nals  with  Eurorack  levels;  therefore,  a  ±5V 
input is recommended. For best audio quality, 
avoid using very quiet signals and amplifying 
the  output  to  compensate.  Conversely,  avoid 
overdriving  the  input  with  very  hot  signals—
use the color input indicator LED as a general 
guide for optimal signal level. Due to internal 
gain  staging,  there  is  a chance  of amplifying 
noise  from  the  bus  board;  hence,  the  quality 
of  power  supply  and  distribution  impact  the 
output signal. We recommend using linear, and 
to a lesser extent, hybrid (switching converters 
since  they  are  quieter  than  switching-type 
power  regulators.  Additionally,  we  suggest 
      
coupling  between  modules  which  can  cause 
interference and instability.
PATCH IDEAS
•  Feed  a sinusoidal  signal from  your oscilla-
tor  to  the  left  or  right  input  of  Koszalin.  Set 
the shift knob to zero and set regen to zero. 
lin tz 
fm
the small attenuator to taste—now you have 
an FM operator. You can replace the input si-
nusoid with any other signal, e.g., from a sam-
note: the 
result of modulation will smear and diminish 
when you add feedback.
•  Take  any  plain  signal  to  Koszalin’s  right 
input, take the right  up shifted  out and 
patch to  the left  input, then listen from  the 
left  down  shifted  out.  These  two  shifts 
will  cancel,  but  the  interesting  part  is  what 
happens in-between. Set the regen switch to 
combi and turn the regen knob up. Manip-
ulate the amount of  shift and density for 
       
with an  extraordinary  response. Try pinging 
         
different effect.
ACCESSORY
Our Coal Mine black panels are available for 
all of Xaoc Devices modules. Sold separately. 
Ask your favorite retailer. •








