MPS

The circle matrix is confusing. You need to make the rectangle visible so it would give a hint that this matrix is actually a square, not a circle. At first I thought that the dot is not follows the cursor properly.

It seems that it is just a mixing between 4 oscilators. I was expecting it to be some kind of morphing. But it's a mixing between.

There could be OSC phase retrigger.

On spots between 2 OSCs you will have some phase issues which makes some notes sound noticeably louder or quieter. For example between STR and WOOD.

The STRING doesn't sound like string. Something between harmonica and string. Probably need more unison voices to be more like string.

I don't know what VIVID does. But seems that each OSC has it's own type. But also could be nice to have control over that. For example when you make vivid for Metal it ads tremolo. But no way you can control the speed of that tremolo.

The release. It seems it doesn't make good job on the percussive envelopes. With percussive envelope even on 10 of release it will be like 0.

Could had monophonic option.

Overall it's a nice concept. Maybe needs a little bit of upgrade.