What is it?

This is "Veronica's Synth".

This synthesizer is exactly the same as TSynth but in a different shape.

Audio output is 3.5mm miniJack.

TSynth Project:

https://electrotechnique.cc/TSynth

https://github.com/ElectroTechnique/TSynth-Teensy4.1

What makes it special?

I'm looking for a musical combination of a synthesizer and a violin. I still haven't found it, so this time it seemed like a good idea to design at least a new shape for an existing synthesizer. It was a very big challenge for me and I am happy with the final result.

I wanted it to be visually appealing and constantly inspire creativity.

I managed to completely redesign the PCB, housing, front panel and knob layout to get this perfect half violin shape. Perhaps in the future I will be able to add the second half of the violin shape as another instrument to complement the first.

Oscillators

• 12 voice polyphony (last note priority), two oscillators per voice, velocity sensitive, detunable with +/- 2 octaves range, Sine/Sample & Hold (like tuned noise)/Square/Sawtooth/Ramp/ PWM/Var Triangle/User waveforms and level. Square, Sawtooth and Pulse waves are band-limited.

• Pulse Width/Var Triangle can be set for each oscillator with PWM by dedicated LFO or from the filter envelope

• Pink or white noise level
• Dedicated LFO for pitch mod (can be retriggered by note on), Sine/Triangle/Sawtooth /Ramp/Square/S&H waveforms
• Pitch can be modulated by filter envelope (+/-)
• Oscillator FX - XOR creates lots of harmonics with certain waveforms and X Mod ‘Cross Modulation’ bell-like sounds.
• Dynamic Unison with all 24 oscillators detunable from each other - one, two, three or four notes can be played with oscillators distributed among them
• Chord Unison with all oscillators playing a chord selected from detune control - major, minor, diminshed…
• Polyphonic Glide with variable time

Filter

• State variable 12dB filter (SVF) with continuous mix between LP and HP (provides notch filter) and BP
• Cutoff freq and resonance
• Cutoff can be modulated by dedicated ADSR envelope (+/-), dedicated LFO
• LFO has same waveforms as pitch LFO (can be retriggered by note on) and rate can be set to match MIDI clock (tempo) with variable time division (1,3/4,1/2,1/4,1/8…)

Amplifier

• Dedicated ADSR envelope
• Volume
• Effect amount and mix - currently for stereo ensemble chorus rate and mix but could be set up to allow choices in Settings menu

Patch & Program Buttons

• Encoder with button for data entry, Back button for menu navigation
• Save and Delete buttons for storing patches
• Holding Settings initialises the current patch to match the panel controls. Holding the Save button takes you into a patch deletion page.
• Settings Menu - Velocity curve, Pitch Bend and Mod Wheel range, VU Meter, oscilloscope display, bass enhance, MIDI In, Thru and Out options.

MIDI

• USB HOST MIDI Class Compliant (direct connection to MIDI controller, no PC needed)
• USB Client MIDI In from PC
• MIDI In 5 pin DIN
• MIDI Thru/Out 5 pin DIN - configurable as a thru with filtering options or an out

Audio

• SGTL5000 Audio Shield 16 bit, 44.1 kHz Stereo out
• USB Audio in/out—appears as 16 bit, 44.1 kHz audio interface on PC

Simple demo:

https://youtu.be/sNLSX1HPiiY