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Inspired by the 'tone boards' that were used to program the mighty Yamaha GX-1's presets, but doing a VST of the GX-1 would an enormous task! This is an emulation of a pair of tone boards, made 'playable' by adding panel controls (LFO, keyboard controls, etc.) based on those of the Yamaha CS-80. This gives us - Tone Boardz. The CS-80 was in many ways a much smaller, simpler, single-keyboard version of the GX-1.
The primary interest here is the unique waveform blending controls; six different waveforms (two with their own dedicated filters) plus noise (added the ability of the Triangle to toggle to a Peak wave). Also, the filter envelopes are the unique Initial Level/Attack Level type used later in the CS-80 (thanks to 'bluesmoke' [and 'cakebox'] for figuring that out).
Available in two styles of envelope controls, one which emulates the Tone Boards' sliders arrangement and unusual labeling ("1st Decay Time/2nd Decay Time"), the other a more conventional knob arrangement and labeling (ADSR).
This is a stereo instrument with 'tone board' I going to the left channel, and 'tone board' II going to the right, with continuously-variable separation.
This does NOT emulate or model the actual sound of any Yamaha or any other vintage hardware synth, just borrows from the control design, layout and panel design of the GX-1 Tone Boards/CS-80.
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 SM, or it's successor 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.