Fearless TSynth
Fearless TSynth
This is a MIDI controlled polyphonic synthesizer,
loosely based on this TSynth by ElectroTechnique.
Instead of a big control panel with potientometers the Fearless TSynth uses
a 320x240 color display and rotary encoder knobs.
This makes it able to fit in a Eurorack size panel.
Features:
- 16 polyphoic voices
- 4 patch channels
- 128 stored patches
- Eurorack panel format
- 320x240 color screen
- 7 Velocirotor knobs
- Built in help screens
- 3.5mm MIDI input
- 3.5mm stereo audio LINE output
- 5V 250mA power input
The Fearless TSynth technology (Teensy 4 plus Raspberry Pi Pico) is also used for the Teensy Drone and Teensy FX Eurorack modules.
Operation
Navagation Knob:
- Spin to select a synth property page (1-9).
- Press for global settings & About.
- Press and Hold for Panic (all notes off).
Data Knobs:
- Spin the knob to change the value
- Press for alternate function
- Press and Hold for Help
Saved Patches:
There is storage for 128 patches on board.
Any patch can be assigned to a channel (1,2,3,10) manually using the "Load" button or programmatically using MIDI Program Change commands.
Changes to a patch are not saved until "Save As" or "Save All" is pressed.
Teensy Audio
The audio synthesis is handled by Teensy 4.x with Audio Shield.
The audio component is headless, controlled by MIDI only.
Voices are connected dynamically to patches.
Each voice has two oscillators, LFO and modulation sources, effects, filter, and envelope.
Plus noise, chorus, unison and ensemble effects.
User Interface
The user interface is handled by one of the RP2040 cores.
The other RP2040 core receives MIDI from a keyboard
and sends it to the Teensy audio component.
The user interface is also capable of exporting and importing all of the patches in CSV format.
Design Documents
| Schematic Diagram | TSynth_N505_schematic.pdf |
| PCB Gerbers | gerbers_N505.zip |
| Mechanical | TSynth Eurorack Panel.stl |
| Source Code - Teensy4 | Arduino_Teensy4.zip |
| Source Code - RP2040 | Arduino_RP2040.zip |
| Front Panel Module | Six Dial Panel Module |
| Navigation Dial Module | VelociBus Modules |
Build Pictures
