Questions & Answers

Fabfilter Pro-L latency on mixbus not compensated - only compensated on Main Out

0 votes
asked Oct 30, 2020 in Studio One 5 by selcukberksan (400 points)

So I had a weird latency issue which was not fixed by the automatic delay compensation of studio one. However, I was able to fix it by changing my workflow a little bit. However, would have loved to keep my workflow as is. The solution also did not make much sense to me

Below is a summarized description of the situation:

System Specs:

  • Focusrite Scarlett 2i2 (1st Gen), 44100 sample rate / 192 buffer size
  • Windows 10 64 bit
  • Intel i5-10600 @ base of 3.30GHZ with boost up to 4.5
  • 2x 8gb DDR4 ram


  • All tracks routed to several busses
  • Busses routed to mixbus
  • Mixbus router to main out
  • Moderate compressor usage (Fabfilter pro c2) for general compression and sidechaining of pads and bass
  • Most channels Fabfilter Pro-Q3 EQ in zero latency mode
  • Put fabfilter Pro-L on mixbus (limiter)
  • Introduced quite some latency (ca. 60ms)
  • All previously created sidechaining out of ryhtm (kick in sidechain not matching main kick, both midi signals)
  • Issue does not occur with Pro-L limited disabled on mixbus
  • Issue does not occur with Fabfilter Pro-c2 or Pro-q3 
  • Issue also doesn't occur when using Studio one stock limiter on mixbus
  • Changing sample rate, buffer or resolution does nothing


  • Moved fabfilter pro-L limiter to main-out (master) channel
  • No more weird timing in side chaining

Basically the Fabfilter Pro-L limiter introduced too much delay on the signal chain and was not being compensated, however it was compensated on the main out for some reason.

Thank you in advance for your replies and advices!


1 Answer

0 votes
answered Oct 31, 2020 by wesleypeterson (20,930 points)
selected Nov 13, 2020 by selcukberksan
Best answer
It sounds like you might not running your sidechain through your mixbus. If that's the case you can route it to the mix bus or route the side chain to a new bus and add delay to that bus to compensate. I use Fabfiler Timeless 2 for that but you could use a ton of different delays. Just set the latency for the delay, zero feedback, turn off the dry signal, turn up the wet. Or if you're like me and don't like having effects on the Main. You could add one last bus to send everything to. I call it preOut and that's where I've been putting pro-L. I hope that helps.