TeensySynth - a polyphonic MIDI synthesizer for Teensy 4.0

This is laamaa's fork of jmechnich's TeensySynth polyphonic MIDI synthesizer.

Development currently done for Teensy 4.0, lighter 3.2 compatible code can be found in a separate branch.

Requirements:

• Teensy 4.0 or something as powerful

Additions to the original:

• Presets
• Second oscillator for all voices
• Pitch LFO
• Filter LFO
• Filter Envelope
• PWM
• Warm ensemble chorus by Quarterturn
• TouchOSC layout for MIDI control
• Moog style filter from DragonSifu's Digital Handdrum project

Things worse than in the original:

• Requires more power
• Nice code was turned into a mess
• Documentation is horribly out of date since I change stuff all the time

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Original readme:

Features

• 8-voice polyphony
• 7 waveforms: sine, square, triangle, sawtooth, reverse sawtooth, pulse, sample & hold
• filter and amplitube envelope per voice
• MONO and POLY mode
• Portamento
• MIDI via USB or serial pins

Supported MIDI controls

• Channel volume
• Channel pan
• Sustain pedal
• Envelope controls
• Filter controls
• Effect controls
• Portamento controls

For details refer to controls.txt.

Wishlist

• Arpeggiator
• Filter LFO/envelope
• Modulation
• improve filter / implement proper gain attenuation

Useful links

• Teensy Audio Library
• Audio System Design Tool for Teensy Audio Library
• MIDI controller number