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Chorg PS-3500byKBplugs
 Chorg PS-3500 by KBplugs is a Virtual Instrument Audio Plugin. It functions as a VST Plugin.
Chorg PS-3500
Product Chorg PS-3500
Developer KBplugs
Price (MSRP) Free
Type / Tags
Plug-in, App & Soundware Format(s)
Operating System Availability
Download Released
 1.1  Downloads Released
Miscellaneous Information
Copy ProtectionNone
Other / Unknown

An approximation of the features and functions of the very rare Korg PS-3300. This is named PS-3500 because it incorporates a few features from the PS-3200. Main feature missing is the microtonal tuning knobs along the bottom of the panel. The X-Y Manipulator from the 3300's keyboard is included in the CV section.

It's not as scary as it looks - each the three sections on the left is essentially a complete single-oscillator polysynth with two dedicated LFOs and an Envelope Generator. The far right section contains the output mixer and CV sources / processors that can be patched to any/all of the three VCO/VCF/VCA 'channels'. One of the 3300's most unique features was the 3-band 'Resonators' in each channel that consisted of three Bandpass filters in parallel whose cutoffs could be modulated.

The GUI is based on the very earliest models of the 3300 that had the black panel and silver/black knobs of the little 770 monosynth. The 3300 soon changed to the grey panel with all-black knobs.

Patching is by drop-downs at each input jack - click on one and a drop-down menu of sources will appear and what's selected will appear over the jack area.


This does NOT emulate or model the actual sound of any Korg or any other vintage hardware synth, just borrows from the control design, layout and panel design of the PS-3300.

Be sure to click on the 'Info' button at the panel's lower left for helpful information and description of the features added from the 3200.


32-bit, so will require jBridge, etc., (or a DAW that will bridge) for use on 64-bit systems.

The link on the website is to a Sync.com folder that also contains the .osm Synthmaker source 'schematics', so anyone with Synthmaker or Flowstone can alter it to suit. It's hoped that anyone who makes significant improvements will share the result with everyone.

As this was originally built for my own use only, there are no presets included; I wanted to come at the instrument anew each time, as one did with vintage analog hardware.

Made with SynthMaker

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