Gearslutz.com - View Single Post - Normal compression VS Parallel compression ...a quick question
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Old 21st May 2009   #7
bob katz
Mastering
 
Joined: Mar 2006
Posts: 3,099

Quote:
Originally Posted by jinksdingo View Post
Excellent question!
The harmonics would be effected.
Harmonics are under and overtones combined with the fundamentals which make up the tones you hear.

A compressor is a "voltage volume turn it downer".
You can determine when it begins to turn it down and when it resumes from turning it down, even how quickly it does it turns it down so you can push more voltage into it to be turned down.

As such harmonics below the compressor threshold and beyond the attack setting would be increased proportionally along with the fundamentals.

Standard "downward compression" begins at the TOP of the dynamic range (highest levels) and brings them down. Parallel compression begins at the BOTTOM (lowest levels) of the dynamic range. But it's possible to "morph" between the two by raising the gain of the parallel compressor that you mix in. The higher the gain of the parallel compressor, the more it begins to affect the midlevels and eventually the higher levels of the signal. When you reach the point where the parallel compressor's mix gain is the same as the source, you are probably affecting levels JUST BELOW the top but still (hopefully) not affecting the highest levels of the source so it can still "sing" a little bit.

The ratios and thresholds of the parallel compressor that you mix in also affects the result. Hope this helps,


BK
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