Conclusion – Slate Digital Virtual Buss Compressors User Manual

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Conclusion

By Fabrice Gabriel
With  the  Virtual  Buss  Compressors,  we  wanted  to  create  something  unique,  powerful  and  easy  

to  use.   But  more  importantly,   we  wanted  to  be  creaKve  and  to  bring  something  new  to  mix  

buss  compression.

The  algorithm  design  had  several  challenges;  we  wanted  to  be  faithful  to  the  original  hardware  

that   inspired  us,   however,   we  also  wanted  to  add  something  unique  to  these  already   great-­‐

sounding   units.   A]er   studying   many   hardware  compressors,   we   realized  that   we  could   not  

cover  all  the  flavors  and  styles  of  compression  with  only  one  unit.  

FG-Grey

At  first,  we  thought  of  this  unit  as  a  very  faithful  recreaKon  of  the  well  known,  BriKsh  mix  buss  

compressor.   We  realized   that   despite  the  simple   electronics,   its  behavior   is  quite  complex,  

especially  in  the  auto  release  mode.  

One  of  the  main  concerns  about  this  unit  is  its  tendency  to  reduce  punch  in  bass  frequencies,  

especially  when  the  gain  reducKon  is  pumping.  So  I  thought  of  a  circuit  design  to  compensate  

for   this   behavior   that   would   allow   mixing   engineers  to   have   the   same   pumping   behavior  

without   having   to  balance  the  bass  differently   for   each   se_ng.   This   resulted   in   an   elegant  

algorithm  design  in  which  we  we  spent  a  lot  of  Kme  tweaking  with  Steven.  

Then,   we  wanted  not  only   to  keep  the  analog  behavior  of  the  original,  but  also  to  design  the  

transient   response  so  it   would  remain   more  arKculate  and   alive  in   any   situaKon,   even   with  

really   heavy   compression.   Finally,   we  thought   that   including  our  precise  model  of  the  classic  

BriKsh  transformer  design  would  be  a  great  addiKon!

FG-Red

The  FG-­‐Red  has  been  a  very  exciKng  compressor  to  work  on,  maybe  the  most   exciKng  for  me  

because  of  its  characterisKc  personality.  The  algorithm  design  could  be  seen  as  the  simplest  and  

the  most  complex  at  the  same  Kme,  because  at  the  end  it  has  the  least  complex   structure  of  

the  three  compressors  but  it  was  the  hardest  to  tweak.  

The  release  behavior  and  the  saturaKon  behavior  are  very  specific  to  this  unit.  Many  mixing  and  

mastering   engineers  have  been  using   the  original  to  obtain  a  very   specific   coloraKon  of   the  

sound,  which  has  been  referred  to  as  “bigger,  wider,  Kghter,  and  punchier.”

The  saturaKon  algorithm  has  been  designed  to  reproduce  this  characterisKc,  as  the  Kming  has  

been  carefully  designed  and  tweaked  to  obtain  that  beauKful  “alive”  transient  behavior.   With  

this  compressor,   it’s  preSy   amazing  to  hear   what   it   does  on  auto  release  even   with  a  liSle  

amount  of  gain  reducKon,  once  again,  due  to  its  unique  Kming  behavior. The  fast,  punchy,    and  

breathing   transient   response  is  preSy   surprising  if   you’ve  never   heard  the   actual  hardware  

compressor  and  I  can  understand  why  it  is  used  by  one  of  rock’s  biggest  mixers.  Once  you  tried  

it,  you  can  never  go  back  !

Slate  Digital  -­‐  Virtual  Buss  Compressors  

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