I've been able to do a lot more work with the synthesizer. Fun times!

Features list:

• Four Oscillators
  • Sine, Sawtooth, Variable Pulse and Variable Triangle
  • Gain, Detune, Pulse Width (for Pulse and Triangle) are able to be set
  • Portamento, during legato can be adjusted, and when the Portamento is modulated
• Pink and White Noise Generators
• 2 LFO Sine Wave Generators
  • 0Hz to 100Hz (adjustable in config to be more)
  • Gain, frequency and range can be modified by breath, expression, or modulation wheel
  • LFO destinations include Oscillator frequency, Oscillator Gain, and Filter Cutoff Frequency
  • LFO1 affect Waveforms 1 and 2, LFO2 affects Waveforms 3 and 4
• Low pass filter
  • Adjustable cutoff frequency offset, modulated by breath, expression, or modulation wheel
  • Adjustable resonance, modulated by breath, expression, or modulation wheel
• Waveform shaping
  • Four 'overdrive' banks that allow for waveform shaping with custom arbitrary waveforms
  • Gain for each waveform shaping is adjustable, overall bank can be modulated by breath, expression, and modulation wheel.
• Effects
  • Flange effect, adjustable
  • Stringy Chorus effect, adjustable (this is a modified chorus that stretches and re-integrates the audio blocks to sound more bowed instrument like)
  • Delay, with adjustable amount and time delay adjustments
  • Reverb, adjustable room size
• MIDI Note transposition via CC channel
• Fine tune via CC channel
• Save and Load patches to SD card (127 of them)
• Play backing tracks from the SD card (127 of them)
  • Adjustable volume via CC channel

Current source snap shots located on my Github Repository: https://github.com/jeffmhopkins/Open-Woodwind-Project/tree/master/src/owp_synth

Here are some screenshots of the OSC interface (via TouchOSC on an iPad) that I have running to control the synthesizer: