Questions & Answers

What is Expansion Ratio?

+1 vote
340 views
asked Apr 14, 2015 in Audio Terms by AlexTinsley (925,070 points)
What is the term Expansion Ratio?

1 Answer

0 votes
answered Apr 14, 2015 by AlexTinsley (925,070 points)
 
Best answer
The expansion ratio sets the amount of noise reduction applied to a signal once the signal has dropped below the expansion threshold. For example, a 2:1 expansion ratio attenuates a signal 2dB for every 1dB it drops below the threshold. Ratio’s 4:1 and higher act much like a noise gate without the ability to tailor the attack, hold and release times.
...