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Building a compressor
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July 14, 2015
4:16 am
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Zach Bolton
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July 13, 2015
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Hi all, new to RackAFX. I'm trying to build a Compressor with RackAFX but don't really know where to start. I have built other plugins and done a lot of the tutorials but since there is no template for this I'm having some trouble. If anyone could lend some tips or point me to some articles I would be very greatful. Thank you.

-ZachSmile

July 14, 2015
8:30 pm
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W Pirkle
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Chapter 13 of my FX book is devoted to dynamics processors: compressors/limiters/gates/expanders, all for RackAFX.

http://www.focalpress.com/book.....240825151/

Its appendix contains many references. If you don't want to buy the book, google Joshua Reiss - he has several excellent papers and tutorials on digital compressors.

All the best,

Will

July 15, 2015
3:28 am
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Zach Bolton
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Thanka you for the response, Will. I have actually got my compressor built and 100% working. I am having one last issue, though. I built a custom VU meter for it and when I rebuild and load it doesnt work right. It's 80 frames just like the stock VU meter which works fine but when i use my meter instead of snapping to the instances like it should it scrolls up and down through them all weird. Any advice on this?

Thanks in advance,
Zach.

July 15, 2015
12:54 pm
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Tom
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Hi Zach,

this sounds like either the height or the number of frames is not set correctly. If one of these values does not match the actual image, the scrolling is "correct" Wink

Cheers
Tom

July 17, 2015
10:46 am
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Zach Bolton
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I have got everything working. Thank you guys for the help! I do have one question though, in the dynamic processor project, the two meters GRR and GRL. i assume that's gain reduction left and right. However when using it they both follow the same value, not actually responding to left and right seperately. Any ideas why? Or maybe that's just not what they stand for?

July 17, 2015
1:43 pm
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Tom
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Hi Zach,

well, the meters just show the values they are given. Have a look at the code and find the places where the values are assigned (you can find the name of the corresponding variables by right-clicking on the meters in the RackFX editor):

In Stereo-Link mode a compressor will typically blend/select the detector signal "somehow" from the input signals and then apply the same gain reduction to both channels (to avoid skewing of the stereo image). So in stereo-link mode the meters must show the same value. In dual-mono or "unlinked" mode it works like 2 mono compressors and the gain reduction meters should show different values (depending on the input signal of course).

Hope this helps.
Tom

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