A Synthesizer in VHDL emulating a Quasimidi Polymorph

(c) 2010 Jürgen Schuhmacher


A setup of my VHDL Synthesizer together with a virtual MIDI controller is used to emulate a Polymorph of the former Company Quasismidi.


Virtual Quasimidi Console

Quasimidi Polymorph

My new LAPTOP Siemens Amilo XI 2550 is used to control a virtual console and driving the VA-Synthesizer via RS232. Common 8 Bit MIDI is used in this case - internally smoothed to 10 bits.


Front End for Keyboard Control


Cinema 4D Software is used to reproduce the Polymorph Surface with some slight changes. Knobs are dynamic during rendering phase and thus can be recorded at various angles to show 3D-behaviour in the future. In the current version a static view is used.


VCO - Synthesis Unit

Virtual Analog Synthesizer for Spartan 3

Logical representation of the FPGA Design (VA Oscillators)

FPGA - Design Spartan 3

FPGA Design of the VA Synthesizer

Physical FPGA Design of the VA-Synth (wrapper).


See also the Roland Front Face:  Virtual JP 8080