MATRIXSYNTH: Roland JX-3P brilliance and resonance after VCF resonance trim pot boost

Wednesday, March 03, 2021

Roland JX-3P brilliance and resonance after VCF resonance trim pot boost


video by thesrabbit

"Recently MIDERA published an interesting JX-3P vs the System-8 Plug-out comparison here: [see this post]

Many have commented that his JX-3P sounds a lot brighter than the plug-out. I have to agree, but I think that maybe mine does as well. Does my JX-3P sound that different from his? Here are some samples that more or less align with the sounds he plays in the first 5 minutes of the video.

Since there has been some discussion about the brilliance, I have included samples at 100%, 50%, and 0% brilliance.

It should be noted that I recently adjusted the VCF resonance trim pots to approx 850 mVp using the 3P's Test Mode 5, A2, as described in the service manual. Factory spec is 600 mVp. Though mine were all between 660 and 680 mVp before I started tweaking. I will be publishing a full walkthrough of that process in the near future. After doing this little exercise, I may decide to boost it even more. Then again, these examples all feature just a single sawtooth from DCO-1. When you add DCO-2 to the mix it definitely drives the filter a bit harder and can produce some squelch. I think I still might want more though.

Also, I realize that this video has the potential for many dislikes as I unfortunately don't have a Roland Cloud subscription or System-8 to compare against. It's meant to be compared side by side with MIDERA's video."

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