A Teensy 4 modular FM polyphonic synth.
SYNTH is a modular FM polyphonic synthesizer, based on eurorack physical format it has however no patch cables in the front but has rather midi and audio jacks in the back.
It is based on Motherboard, my modular platform, see in there for schematics.
You can get the PCBs and front panel here:
https://ghostintranslation.bandcamp.com/merch/synth-panel-and-pcb
Height: 3U / 128.5mm
Width: 8HP / 40mm
What things you need to make it work:
1 Teensy 4.0
1 Teensy audio board
1 MOTHERBOARD6A pcb
1 MOTHERBOARD6B pcb
1 SYNTH front panel pcb
6 vertical linear 10k potentiometers with their nuts
1 5 pins male header
1 5 pins female headers
5 14 pins male header
5 14 pins female header
2 14 pins long female header
4 CD4051 multiplexers
4 DIP16 IC sockets (optional)
2 3.5mm jack connectors
1 resistor ~ 22ohm
2 LED
1 4 positions dipswitch (optional)
Here is a list of useful links to get these parts: https://github.com/ghostintranslation/parts
Note:
Note: Be careful how you place the potentiometers:
In order to run any sketch on the Teensy you have to install Arduino and the Teensyduino add-on. Follow the instructions from the official page: https://www.pjrc.com/teensy/teensyduino.html
Synth.ino
located in the Synth
folder of this repo.Serial + midi
.Here is a description of the 6 inputs and what they do:
1. Mode
1. Synth
2. Arp
3. Drone
2. Param
1. Synth: Glide
2. Arp: Time
- Arp with Midi clock (TODO)
3. Drone: Free frequency
3. Shape
- Sine / triangle
4. FM
- Modulator frequency and amplitude
- 3 divisions:
1. 0 to 10Hz, low amplitude
2. 0 to 40Hz, low amplitude
3. 0 to 1000Hz, higher amplitude
5. Attack (0 to 2000ms)
6. Release (0 to 2000ms)
All of the inputs are available via MIDI CC.
SYNTH supports MIDI in via USB and TS jack. It doesn't send out any MIDI.
The MIDI in default settings are:
CC 0 = Mode
CC 1 = Param
CC 2 = Shape
CC 3 = FM
CC 4 = Attack
CC 5 = Release
These settings can be changed in the code or via the web editor: http://ghostintranslation.com/editor
Important:
The MIDI input and output jacks are directly connected to the Teensy serial input and output. That means there is not protection against voltage or current. It is primarily ment to connect 2 of these modules, or 2 Teensy together. If you want to connect something else to it make sure to provide a maximum of 3.3v and 250 mA.
You can find me on Bandcamp, Instagram, Youtube and my own site:
https://ghostintranslation.bandcamp.com/
https://www.instagram.com/ghostintranslation/
https://www.youtube.com/channel/UCcyUTGTM-hGLIz4194Inxyw
https://www.ghostintranslation.com/
To support my work:
https://www.paypal.com/paypalme/ghostintranslation
This project is licensed under the MIT License - see the LICENSE.md file for details