System and Process Model

The synth will receive inputs from a control surface. This could be a midi controller or the interface of the synth itself. The pitch and control signals go into the signal generation bank which exists in the DSP core. From there each generator is triggered based on its state (oscillator, LFO, envelop) and the signal is passed around based on the user determined algorithm or modulation configuration. After this the audio signal is sent to the VCF to be filtered, then to the VCA for its level to be attenuated. It is then passed through the effects processor and then out of the outputs on the rear of the synth. In a studio environment, where this synth would spend most of its time, the signal is then sent out to an ADC so it can be processed inside audio editing or music production software.

The development of this synth will be fairly linear

1. DSP code for a single operator will be written to ensure one module is able to perform all the necessary functions and give the all important analog-like sound
2. The code will be expanded for 6 operators and the inter-modulation and algorithms will be explored
3. The code will be ported to a physical DSP development board to determine the necessary processing power needed for the synth
4. The analog part of the signal chain will be mocked up and tested with the development board to form a complete working synth voice
5. When a complete voice is working, the design will be multiplied to 8 voices. Different routing configurations with the DSP core will be tested
6. The analog/digital FX engine will be developed and linked to the output of the 8 voices.
7. A control scheme and user interface will be designed to allow access to all crucial functions.
8. A prototype synth will be built
9. The firmware will be given a GUI for user interaction in the onboard screen and the modulation functionality will be tested
10. The device will be sent out to a few producers for testing, feature input and bug testing