DRONE - Teensy Modular Synth

video by Ghost In Translation

"DRONE v1.1.3 is now available, it fixes noise issues on the Mix parameter and some smoothness issues.

Code on https://github.com/ghostintranslation...​
PCB and panel on https://ghostintranslation.bandcamp.c...​

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DRONE is a modular 4 voices drone 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 my homemade platform Motherboard6.

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Follow me
https://www.instagram.com/ghostintran...
https://ghostintranslation.bandcamp.com"

Wavetable synthesizer / Prototype D.I.Y based on Teensy 4.1 / 21 Presets sounds

video by waxxmaster

Additional video below.

"Triple voice wavetable synthesizer / Triple Wavetable oscillators module :
(Future eurorack synthesizer module)

CLICK FOR MORE »

Teensy 4.1 DIY Synthesizer "Jeannie"

video by Rolf Degen

"First sound samples with PCM5102A DAC"

Teensy Eurorack Oscillator + Build

video by otemrellik

"A new module built from a Teensy 3.2
Schematic + Code:
https://github.com/otem/Eurorack/tree..."

Prototype Jam! TINRS Fenix IV, mmalex Plinky and Faust on Teensy 4.0

video by Making Sound Machines

"Here's a little prototype jam, using all the lovely modular gear and hardware we've been testing these last weeks! The granular glockenspiel is made with This is Not Rocket Science's Fenix IV Eurorack compatible system-in-a-box - this is a beta machine but production hardware is actually done! TiNRS’ Stijn and Lauri built in an awesome way to load sample banks into the digital oscillator in wavetable mode, so we were able to use a recording of my childhood glockenspiel as grains in this synth sequence, with beautiful warbles from the onboard delay! TiNRS Fenix' sequencer allows for each of its four channels to have its own rhythm subdivisions and to be transposed via MIDI - this is exactly what's happening here using the Arturia keystep pro. Fenix' extra seq channels are triggering a kick from GHzTomash Callisto teensy arduino DIY drum module, and gating some noise percussion using the Fenix' VCA. The lush swell of reverb at the end is coming from a combination of Fenix built-in verb and using our beta unit mmalex Plinky as an FX processor - DIY kits and the expander will soon be available again from Thonk.

The stereo organ pad is made on a Teensy 4.0 arduino, running an additive synth patch made with Faust DSP and the teensy audio library, controlled via MIDI with the Arturia Keystep Pro and patched into the Eurorack with our own Multiplikand module. It's rhythmically chopped using This is Not Rocket Science's Wobbler complex LFO into Mutable Instruments Streams dual dynamics gate, using the TiNRS Fenix' sequencer to reset the LFO in time with the sequence. The bass is Moogs DIY voice Werkstatt 01, a CV-controlled voice with a ladder filter and that lovely Moog sub.

The beats in the ending come from our circuit bent e-licktronic NAVA TR909 clone, sequenced using the Roland Aria TR-8 drum machine. While the NAVA is an exact copy of the famous TR909 circuits, hacked by us with 34 mods to vastly expand the sonic palette of the instrument, the TR-8 is a digital emulation of the same synth and somewhat shunned for its color scheme. If you look beyond that, it's a very practical and lovely machine.

❤️ Huge thank you to everyone sending us stuff to test and build! This is extremely fun!"

Beatstep Pro Breakout

video by otemrellik

"Just a quick look a a module I built to modify and distribute the MIDI from my Beatstep Pro.
Build stuff on Github: https://github.com/otem/Eurorack/tree...​"

Teensy Eurorack Drum Module

video by otemrellik

"Just a quick look at a Eurorack Drum Module I made. Schematic can be found here:
https://github.com/otem/Eurorack/tree...​
Info on Teensy Audio Library: https://www.pjrc.com/teensy/td_libs_A..."

Teensy Gurdy Synthesizer Demo

video by BanjoMasterPete

"A demonstration of the capabilities of my latest project which is based on the working principles of a hurdy gurdy. 12 strings (9 momentary, 3 latching) are activated by touching their corresponding touch plate and tuned using the knobs above them. These strings are mixed into a master filter where the rotational speed of the encoder crank controls the cutoff frequency. Additional controls above the crank affect filter resonance, master volume, and the attack/decay of the touch envelopes. The switches activate the tuning mode which ignores encoder input and change the wave shape of the strings. Some plate reverb was added about halfway through, otherwise this is a direct recording."

Previous incarnation:

Teensy-based Hurdy Gurdy Synth
"Here's a short demo of an instrument I've been working on. Liberal use of reverb helps mask the inconsistencies"

Teensy 4.1 DIY Synthesizer

Rolf Degen

Teensy 4.1
DIY Synthesizer "Jeannie"
Part 3: Waveforms


See the Rolf Degen label below for more.

SOUNDMIT 2020 - Exhibitor - Sandro Grassia - Lilla open source sampler

SOUNDMIT

"LILLA is a 16 voices multitimbral and multi-midi polyphonic audio sampler, based on Teensy 4.1 and equipped with 32MB flash memory for 16 bits audio samples. LILLA offers ADSR and trimming functionalities and various play modes (forward, reverse, f/r/f+r loop) and allows real-time editing during the performance without interruptions. Audio samples are uploaded using an SD-micro card (optional) ; firmware and user-guide can be downloaded from https://github.com/SandroGrassia/Lill.... I/O: midi-in, headphones (stereo), line-out (stereo); power supply: 5V / usb micro-b.

LILLA è un audio sampler polifonico a 16 voci, multitimbral e multi-midi, basato su Teensy 4.1 e dotato di 32MB di memoria flash per i sample audio (16bit). LILLA offre funzionalità ADSR e trimming, varie modalità riproduzione (forward, reverse, f/r/f+r loop) e consente l'editing real-time senza interruzione durante la performance. I sample sono caricati con una scheda micro SD (opzionale); il firmware ed il manuale d'uso sono disponibili su https://github.com/SandroGrassia/Lill.... I/O: midi-in, headphones (stereo), line-out (stereo); alimentazione: 5V da via usb micro-b."

FASELUNARE - Microcosmos - IFC2020 presentation

FASELUNARE

"Today we participated in the International Faust Conference 2020 with our Microcosmos project. Here you can see our presentation.

We are finalizing the prototype and the new website." It appears to be a Teensy based DIY project. Some audio demos come in towards the end of the video. This is the first post to feature Microcosmos. You can find additinal posts featuring FASELUNARE via their label below.

New ElectroTechnique TSynth - DIY Teensy Synth

ElectroTechnique

Note this is the first post to feature ElectroTechnique.

"TSynth is a DIY synth based on the Teensy 3.6 MCU board. It is six voice polyphonic with two oscillators and very comprehensive control and options. Patch saving and recall, three MIDI in options and USB digital audio. It is open source and the PCB and front panel are now available to buy on Tindie. The intention was that the cost of parts to build this synth are around $99 and it should be a serious instrument. There are many features and full details are on https://electrotechnique.cc

All sounds are directly from TSynth with built-in stereo chorus - Youtube tends to muffle the sound, the bass will go very low. I'm hoping that end users will produce better demos and contribute to the code."

Specs via ElectroTechnique:

Oscillators

Six voice polyphony (last note priority), two oscillators per voice, detunable with +/- 2 octaves range, Sine/ Sample & Hold (like tuned noise)/ Square/ Sawtooth/ Ramp/ PWM/ Var Triangle/ User waveforms and level
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 (+/-)
XOR ‘Ring Mod’ (creates lots of harmonics with certain waveforms)
Unison with all twelve oscillators detunable from each other
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 for DAC output
Effect amount and mix - currently for stereo ensemble chorus rate and mix but could be set up to allow choices in programmer

Programmer
160x80 IPS colour display
Encoder with button for data entry, Back button for menu navigation
Save and Recall buttons for storing patches, holding Recall initialises the current patch to match the panel controls. Holding the Save button takes you into a patch deletion page.
The programmer makes the synth very flexible with future possibilities for changing User waveforms, alternative filters, alternative effects with further parameter settings.

CLICK FOR MORE »

SAMPS - Eurorack Module

Published on Jun 1, 2020 otemrellik

"Polyphonic sample player built from Teensy 4.0.
More Info here: https://github.com/otem/Eurorack/tree..."

"A simple polyphonic sample player with effects. All sample playback credit to Sandro on the Teensy forum. Probably a better audio out schematic can be found here (the bi example, first image)"

open e-drums - Open Source Drum Synthesizer with Teensy 3.2

Published on Dec 31, 2019 Ryo Kosaka

https://github.com/RyoKosaka/HelloDru...

Features

Single piezo pad, Dual Piezo pad, 2 zone cymbal, 3 zone cymbal
Compatible with YAMAHA's 3 zone cymbal(PCY135/PCY155)
Compatible with SoftPot, FSR and Optical(TCRT5000) type hi-hat controllers
Sensing with MUX(4051 and 4067)
Setting mode with LCD or OLED
Sensitivity, Threshold, Scan Time, Mask Time, Note Number can be set with each pad
Works with ESP32 and Teensy and AVR boards such as UNO and MEGA.

https://open-e-drums.com

"open e-drums" is a completely open source electronic drum. Pads that can be produced with 3D printers, and midi converters are all open source hardware. Arduino code for sensing is also available. You can create your own e-drum from scratch, or add pads to the Roland and YAMAHA kits.

ABOUT
This project started by accident. At the time, I was a product design student who had used Arduino just a little. When I found a drum mania controller at a used store at a bargain price, I was somehow attracted to it and bought it. This is the beginning of everything. I took it apart and played with Arduino. I used a piezo for the first time at that time. I learned the delicate sensing ability of piezo. I realized the greatness of electronic drums such as Roland, Yamaha, and Alesis, which process the signals beautifully. I want to try it myself.

I didn't have any knowledge of programming or electronics. In other words, I have acquired a lot of knowledge through this project. For some people, this project is just a reinvention of the wheel. But it's a very meaningful project for me. As I proceeded with this project, I drew on the knowledge of many predecessors. Many of them keep information open. That's great. So I decided to publish this project as an open source hardware project. I would be happy if this project helps someone create something."

Ghost In Translation SimpleSynth FM AM RING Teensy Based Eurorack Module

Published on Dec 16, 2019 Ghost In Translation

"I finally 'finished' my custom synth SimpleSynth.

SimpleSynth is a Teensy based synth with the main objective to keep it simple (code wise and hardware wise).

Timestamps at the bottom!

In this demo I was sending MIDI notes via USB to the synth and I recorded the audio raw coming also through USB.

Features
- FM, AM and Ring synthesis with 1 carier and 1 modulator
- Polyphonic synth, Arpeggiator and Drone modes
- Controllable modulator gain and frequency
- Controllable Attack, Decay, Release
- MIDI over USB
- MIDI through the Hobbytronics USB Host Board Controller
- Audio jack output
- Audio over USB

I used a Teensy 3.2 because Teensy 4.0 is not yet capable of all the USB possibilities and will be ready in a few months probably. So I will post an update when I test it with Teensy 4.0.

All the sources are on Github
https://github.com/ghostintranslation...

Stay in touch
Bandcamp - http://ghostintranslation.bandcamp.com/
Instagram - https://www.instagram.com/ghostintranslation/

Timestamps
00:10 Raw audio demo start
00:12 Release
00:32 Attack
00:48 Decay
01:13 Synth FM
01:15 Modulator amplitude
01:22 Modulator Frequency
02:35 Synth FM x10
03:50 Synth AM
04:20 Synth AM x10
04:55 Synth Ring
05:38 Arpeggiator
05:50 Arp Time
06:30 Drone
06:35 Drone Frequency
07:24 Drone with reverb
09:18 Weird Ambiant with reverb
10:08 Synth with reverb

Let me know what you think!"

Teensy DIY Midi Controller Jam - Moog Animoog App, Fugue Machine

Published on Nov 30, 2019 maasijam

"Jamming with my Teensy based Midi Controller.
Animoog sequenced by Fugue Machine.

BOM, Gerbers and Teensy code will follow. I plan to create a website where you can download all the needed files for the controller."

iPad / Eurorack ambient jam. Model D App, Teensy Midi Controller, Qu-bit chord v2, Eventide H9

Published on Nov 28, 2019 maasijam

"iPad / Eurorack ambient jam.

Background ambient sound: Qu-bit chord v2 is modulated by Pamelas New Workout. All four outputs of chord going into vcas, which are also modulated by Pam.

Fx: Eventide H9, 2HP verb, Expert Sleepers Disting MK4 (Stereo Delay)

Lead sound: Moog Model D App controlled by my Teensy based Midi-Controller.

Fx: Internal delay of the model d app."

SOUNDMIT 2019 Lilla Midi Expander

Published on Nov 2, 2019 BAMTV

"The Lilla midi expander is currently a prototype/hobby project. It is based on the Teensy 3.6 microcontroller which has powerful features. The code is open source, the machine has an eurorack format but is controlled by midi. Lilla’s controls features 12 rotary encoders and 8 pushbuttons and includes MIDI in, MIDI thru, and stereo out. Via the SD card it can load samples, layered across the keyboard, and those can be changed with pitch and envelopes. It plays back with 8 voice polyphony. It also has effects like distortion, bit crusher and compressor on board.

Links
https://github.com/SandroGrassia/Lill..."

"Lilla is an open source project for a polyphonic midi expander, based on Teensy 3.6 microcontroller. Lilla includes:

devices/ICs:

n.1 Teensy 3.6 - overclock 240MHz
n.1 Teensy Audio Adaptor
n.1 flash memory chip W25Q256FV (32Mbyte serial flash memory)
n.3 CD74HC4067 (16-Channel Analog Multiplexer)
n.1 128x160 TFT color display
n.1 HCPL260L (single-channel optocoupler)
n.1 CD4093B (quad 2-Input NAND Schmitt Triggers)
commands:

n.12 rotary encoders with pushbutton
n.8 pushbuttons
Teensy program pushbutton
i/o interfaces:

midi in (DIN)
midi thru (DIN)
stereo line output
micro-SD socket
polyphony:

reading files from flash memory: 8
reading files from RAM: 12
Audio files and presets

Lilla uses 44.1kHz 16bit mono .RAW (header-less) audio files, imported from micro-SD card. Lilla can store up to 100 Sounds; a Sound is described by these elements:

an audio file
interval to be played (first sample A - last sample B): from 100 samples to full length
play mode: A -> B, B -> A, loop A -> B, loop A <-> B, loop B -> A, loop B <-> A
fine tune
volume
ADSR parameters
Attack ramp: fast, slow
Audio file is played from flash memory until the interval to be played contains more than 675 samples. Below 675 samples, audio is played from RAM: in this case, an automatic pitch-correction keeps the sound in tune with the standard tuning (middle C: 261.6Hz).

Lilla can store up to 30 setups called Sessions; a Session is a group of up to 8 Instruments; each Instrument is defined by:

a Sound
keyboard span (first key - last key)
keys mode: momentary, hold
root-key
volume
In a Session, all 8 Instruments can also be layered on each other.

Additional details at pics at https://github.com/SandroGrassia/Lilla-midi-expander

Teensy synthesizer - mini project Creative Electronics

Published on Apr 11, 2019 Kevin R

"This is our mini project for the course Creative Electronics at TU/e."

Polaron DIY drum machine sneak peek

Polaron DIY drum machine sneak peek from a guy called tom on Vimeo.

"A short sneak peek of the polaron diy drum machine. Its a 6 track digital drum machine based on the teensy 3.6 microcontroller. Work in progress

Make it yours:

Update: PCB / Code is relocated to: https://github.com/zueblin/Polaron"