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RNC Threshold Question
Old 29th August 2007
  #1
Gear Nut
 

RNC Threshold Question

I thought I had a hang of the dbVU - dbFS conversion factor. From what I've read, I thought that 0dbVU was identical to -18dbFS. This led me to assume that the 0db mark on the RNC threshold knob referred to -18dbFS.

I played a constant -20dbFS signal on a synth, and started moving the threshold on the RNC, with the ratio set at 25:1. Strangely enough, The signal began to be compressed at around -20dbFS with the threshold knob up around +15-20. What the heck?

Am I wrong that 0 db on the RNC knob refers to -18dbFS in the software? Can anyone think of anything I may be doing wrong?
Old 30th August 2007
  #2
Gear Nut
 

I gets no love :(
Old 31st August 2007
  #3
Gear Nut
 

errrr, em,... I just twiddle that knob thingy till the light thingees light up a little bit and leave it at that.
Old 31st August 2007
  #4
Lives for gear
 
emrr's Avatar
on my fourth beer I can't articulate any clearer than:

It's far more complicated than that. Are we talking peak metering, RMS metering, a mix of both; it all looks different. And what's the impedance match between connected equipment; is anything being loaded down? 0 db FS is a moving target dictated by the system in question; refer to the specs. etc etc.
Old 31st August 2007
  #5
Lives for gear
 
Weasel9992's Avatar
 

Another point to be made is that full-scale vs. 0dBVU can and does vary somewhat...it usually lands somewhere between -20dBFS and -18dBFS though, depending on how the equipment is calibrated.

Weez
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